ramullinax
In Memoriam
Is there a thread/link to the Koralia mod?
mjmods VS. Koralia
- Thread starter zbrook1
- Start date
Rhodesholar
New member
With that thought in mind why doesn't Hydor (or whoever for that matter) provide a low, med and high flow prop assemblys so you can interchange them to better tailor the flow to your needs? Now that would make sense and justify paying the extra amount over the MJ Mod.
I would also bet that DIY modding of the Koralia voids the warranty.
ramullinax
In Memoriam
Assume I know nothing about the MJ mod (because I know nothing about the MJ mod). Where would I go?
Rich continue to insist his MJMod can do 3,000gph and uses only 11W, ok now he says 12W.
The MJ itself is a very inefficiently designed powerhead, the motor is rated 20W, and as a result can be over-driven up close to 30W. For that reason you can put a large enough prop on it to pump a lot of flow but you also overdrive the motor so the watt draw will be close to 30W.
All the AC motors used in MJ, Koralia and Nanostreams are the same principle, the bigger the prop you use the more flow it pumps and the more watts it draws, until such point the motor can not handle the prop.
So yes an MJ1200 motor can drive a much bigger prop than a K4 motor (12W rated, 17W max and 1700 gph max), and a K4 motor can drive a bigger prop than a Nanostream 6025 (7W rated, 1250 gph max). What you can't get is have one motor pump twice the flow and draw half of the energy.
So I continue to ask Rich to tell us, for the maybe 10th time now, how you measured the flow to be 3000 gph, and what did you use to read the watts draw during that test. So far I had no answer. Don't get me wrong, I like to have a pump that can do 3000 gph and uses only 11W, but my MJMods did not do nearly as good so let us in on the secret Rich.
As far as popularity goes, the appearance of the pump is of course important, if not the most important factor, and most users are not as good DIYers or don't care about DIYing stuff unless they have to. So when there was no alternatives, MJmods were the best things ever happened.
Now there are K pumps, Tunze nanos, they are sold by the thousands every month, everything else is just conjecture among us ego maniacs.
stevedola
Master of my domain
i have 3 nanos in both my tanks with excellent results...i never had 1 problem at all. as far as i know tunze has fixed the flaws that surfaced with their inintial supply. also
i personally would rather not look at an eye sore in a tank that ive investested thousands of dollars into. I dont need the extra 1000 gph (for both pumps) in my tank...i already have plenty. enjoy your pump and Ill enjoy mine. obviously you like it alot, I however dont and wont waiver in saying---mjmods are junk.
i personally would rather not look at an eye sore in a tank that ive investested thousands of dollars into. I dont need the extra 1000 gph (for both pumps) in my tank...i already have plenty. enjoy your pump and Ill enjoy mine. obviously you like it alot, I however dont and wont waiver in saying---mjmods are junk.
So you had a bad experience building the mj mod whether because you and whoever built it did a poor job doing so.... Instead of fixing those flaws you immediately call them junk. Who built them? So whose fault was it that they didn't work? :lol:
Maybe this should be considered "junk" too
http://s170.photobucket.com/albums/u260/dhnguyen/tunze_nano/
Hmmm... Indeed.
Maybe this should be considered "junk" too
http://s170.photobucket.com/albums/u260/dhnguyen/tunze_nano/
Hmmm... Indeed.
Oh yeah, that particular nano pump was junk, and they replaced it and you modded it and I learned the owner is now very happy with it and no longer considers it junk.
But Steve's MJMod did not get any better so it remained junk in his mind, regardless why it did not work.
That's where the difference is, MJMod required more DIY skills, and when done badly one could not simply get a good replacement from the vendor.
Rhodesholar
New member
jacmyoung,
As I stated the 900 will move almost the same amount of water as the 1200 and is rated 8.5 watts, so technically a 900 will draw 12.75 watts and move 2000 gph.
You said the MJ stock is a very ineffecient pump, and that is very true that is why we mod them. Better performance per watt and they are cheap.
Show me another pump for $20 total and a half hour of time that will move lets say to keep it real, 1500 gph and draws 30 watts.
And I am conceding alott here.
As I stated the 900 will move almost the same amount of water as the 1200 and is rated 8.5 watts, so technically a 900 will draw 12.75 watts and move 2000 gph.
You said the MJ stock is a very ineffecient pump, and that is very true that is why we mod them. Better performance per watt and they are cheap.
Show me another pump for $20 total and a half hour of time that will move lets say to keep it real, 1500 gph and draws 30 watts.
And I am conceding alott here.
<a href=showthread.php?s=&postid=9965945#post9965945 target=_blank>Originally posted</a> by Rhodesholar
jacmyoung,
As I stated the 900 will move almost the same amount of water as the 1200 and is rated 8.5 watts, so technically a 900 will draw 12.75 watts and move 2000 gph.
You said the MJ stock is a very ineffecient pump, and that is very true that is why we mod them. Better performance per watt and they are cheap.
Show me another pump for $20 total and a half hour of time that will move lets say to keep it real, 1500 gph and draws 30 watts.
And I am conceding alott here.
You don't need to concede anything, just use real test data, not words such as "technically" what it can do.
Watts rating has nothing to do with what the motor can actually deliver. I am not saying 2000gph at 12.75W is not possible, but you need to tell me how you get the flow rate with what kind of test and how you measured the watts.
I have never heard any of the MJMods people explain to me or provide me a link to explain how they measured those flow rates they claimed, and how they got the watts readings. In fact many of them don't even have a kill-a-watt meter because as they put it, they are too advanced to be bothered with such a cheap device.
All the tests we have done on the Tunze Nano Mod thread had been verified and duplicated by multiple users, and different methods ended up agreeing with one another. And all the tests were explained in detail and critiqued by other readers.
When you make a claim such as 3000 gph at 12W, or 2000 gph at 12.75W, which appear incredible compared to those other prop pumps, you'd better have solid ground to stand on.
jmkins
New member
I had two mods in my tank for over a year and loved them. I dont remember what props I used but I wasn't getting near 3000 gph. I think a lot of the flow estimates on mods are very optimistic though.
I did replace one mod with a K4 and I'm glad I did. My mods need to be cleaned a lot to keep them spinning. I switch out the one in my tank with my spare about every month when I realize that it pretty much stops spinning at all. I dont know why but I get a lot more mineral build up on my mod than I do on my K4. Or the build up seizes up the motor more rapidly.
Personally I love the wide flow of the K4 and will soon replace my mod with a second one. I'm just happy that we have choices in prop pumps now that can push a good amount of water without making me take out a second mortgage. I'm looking forward to the rumored controller from hydor, which is the reason I went with them over the nano's.
I did replace one mod with a K4 and I'm glad I did. My mods need to be cleaned a lot to keep them spinning. I switch out the one in my tank with my spare about every month when I realize that it pretty much stops spinning at all. I dont know why but I get a lot more mineral build up on my mod than I do on my K4. Or the build up seizes up the motor more rapidly.
Personally I love the wide flow of the K4 and will soon replace my mod with a second one. I'm just happy that we have choices in prop pumps now that can push a good amount of water without making me take out a second mortgage. I'm looking forward to the rumored controller from hydor, which is the reason I went with them over the nano's.
The reason the K4 is more forgiving is because they designed a bigger intake, a bigger motor and cavity and put a small prop and magnet driver in it. These are actually mentioned by Hydor as selling points I believe. The downside of it is of course for 1200 gph the pump appears bigger than it needs to be and draws more power (12W) than it has to be. The Tunze nano 6025 for example can pump 1250 gph (after simple mods) while drawing 7W and at almost half the size, but it does require more cleaning.
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tkeracer619
New member
here is a MJ1200 high flow kit via Kill-A-Watt. I trimmed the prop down to reduce the flow.
Rhodesholar
New member
jacmyoung,
Show me another pump for $20 total and a half hour of time that will move lets say to keep it real, 1500 gph and draws 30 watts.
Well?
Ok, MJ mods is lying.
Thank you for visiting Mjmods.com .We provide easy to implement kits to mod your Maxi Jet aquarium pumps into high flow pumps . A MJ 900 can be modified from 250 GPH to 1500 GPH and the MJ 1200 can be modified into an incredible 2,400 GPH pump.
http://www.mjmods.com/
So is everyone else. It's a conspiracy. That's why everyone complains that they put out to much flow. Forget that my return from my fuge taking in account for head pressure is 1107 gph and my MJ mod smokes it. I am sure the manfacturer of my return pump skewed their data to make the MJ mod look good.
Since I am lying I will tell you what. If your ever in North East Wisconsin PM me and I will give you directions to stop by my house. I will show you first hand.
I am not making this stuff up.
Show me another pump for $20 total and a half hour of time that will move lets say to keep it real, 1500 gph and draws 30 watts.
Well?
Ok, MJ mods is lying.
Thank you for visiting Mjmods.com .We provide easy to implement kits to mod your Maxi Jet aquarium pumps into high flow pumps . A MJ 900 can be modified from 250 GPH to 1500 GPH and the MJ 1200 can be modified into an incredible 2,400 GPH pump.
http://www.mjmods.com/
So is everyone else. It's a conspiracy. That's why everyone complains that they put out to much flow. Forget that my return from my fuge taking in account for head pressure is 1107 gph and my MJ mod smokes it. I am sure the manfacturer of my return pump skewed their data to make the MJ mod look good.
Since I am lying I will tell you what. If your ever in North East Wisconsin PM me and I will give you directions to stop by my house. I will show you first hand.
I am not making this stuff up.
Jim_S
Timo Boll
I know these maximods are pretty cool. I decided to get some 6100's instead, but the maximods are a cool, yet not as powerful substitute. At a very affordable price.
However, I haven't seen anyone yet answer j-young's question. Where are you getting these results? How do you really know?
And instead of throwing out defensive statements and trying to shift the focus elsewhere, try to answer his question. I'm curious too. Is there any real data that backs up the claim of 1500, or 2400, or even 1000 gph?
Cheers,
Jim
However, I haven't seen anyone yet answer j-young's question. Where are you getting these results? How do you really know?
And instead of throwing out defensive statements and trying to shift the focus elsewhere, try to answer his question. I'm curious too. Is there any real data that backs up the claim of 1500, or 2400, or even 1000 gph?
Cheers,
Jim
<a href=showthread.php?s=&postid=9966306#post9966306 target=_blank>Originally posted</a> by Rhodesholar
jacmyoung,
Show me another pump for $20 total and a half hour of time that will move lets say to keep it real, 1500 gph and draws 30 watts.
Well?
Ok, MJ mods is lying.
Thank you for visiting Mjmods.com .We provide easy to implement kits to mod your Maxi Jet aquarium pumps into high flow pumps . A MJ 900 can be modified from 250 GPH to 1500 GPH and the MJ 1200 can be modified into an incredible 2,400 GPH pump.
http://www.mjmods.com/
So is everyone else. It's a conspiracy. That's why everyone complains that they put out to much flow. Forget that my return from my fuge taking in account for head pressure is 1107 gph and my MJ mod smokes it. I am sure the manfacturer of my return pump skewed their data to make the MJ mod look good.
Since I am lying I will tell you what. If your ever in North East Wisconsin PM me and I will give you directions to stop by my house. I will show you first hand.
I am not making this stuff up.
Again full of conjectures no actual data proof. I never said you were lying so don't self incriminate. I just need you to show me which test did you do to get the 3000 gph and 12W or 2000 gph at 12W or 2400 gph at ?W.
I already said I don't insist they are impossible but you have to do a little better than just throwing kids talk around in order to convince me.
<a href=showthread.php?s=&postid=9966214#post9966214 target=_blank>Originally posted</a> by tkeracer619
here is a MJ1200 high flow kit via Kill-A-Watt. I trimmed the prop down to reduce the flow.
So this is the closest we get to the real proof, that you have a high flow kit, I assume rated 2400 gph? and you trimmed it down so maybe 2000 gph afterwards? and you recorded 19W.
Anyone else?
jmkins
New member
Its not just the gph out of the pump but the distribution and velocity profile. With my mods, albeit they were basic, the flow was concentrated at the small opening. The result was a very laminar flow that I had to bounce off the wall or else it would kill everything in its path. The K4 I have produces a very broad cone that travels the 3 ft of my tank in a turbulent pattern.
I still intend to keep a mjmod blowing detritus off the lower level of my tank after I pick up a second K4 but for overall random flow I like the K4 more.
I proposed this test when the maximods were young and never heard an answer; put two 20+ gallon garbage cans stacked on top of each other offset enough for the top can to hold a pump that empties into the first. Fill the top can with water and the pump output drilled and sealed into the bottom of the can. Put a scale underneath the bottom can. Fill the top can with water (weigh if possible) and plug the pump in. Measure the amount of time it takes to empty the top can. Weigh the remaining water in the top. Weigh the bottom can. Calculate the bottom cans water weight. Calculate the weight divide by the time it takes to fill and repeat the experiment several times.
I personally dont believe in bag tests, where a small volume of water is measured. There is too much room for error with these tests. I'm not trying to downplay the mjmods, if I upgrade I will put these in my tank. I just would like to see a more realistic experiment in terms of gph.
I still intend to keep a mjmod blowing detritus off the lower level of my tank after I pick up a second K4 but for overall random flow I like the K4 more.
I proposed this test when the maximods were young and never heard an answer; put two 20+ gallon garbage cans stacked on top of each other offset enough for the top can to hold a pump that empties into the first. Fill the top can with water and the pump output drilled and sealed into the bottom of the can. Put a scale underneath the bottom can. Fill the top can with water (weigh if possible) and plug the pump in. Measure the amount of time it takes to empty the top can. Weigh the remaining water in the top. Weigh the bottom can. Calculate the bottom cans water weight. Calculate the weight divide by the time it takes to fill and repeat the experiment several times.
I personally dont believe in bag tests, where a small volume of water is measured. There is too much room for error with these tests. I'm not trying to downplay the mjmods, if I upgrade I will put these in my tank. I just would like to see a more realistic experiment in terms of gph.
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