Undergravel Filter for a reef tank

So it pushes detrius out? How does it trap waste? Or does it trap waste? If it doesnt trap waste how is it called filtration? I am not being a smart arse, these are genuine questions. I would like to learn.

Edited_PaulB, answered without seeing the questions. LOL
 
Yes, it is the direction of water flow through it.

UGF the water flows down

RUGF the water flows up

Yes but with a regular UG filter, you can't clean the water before it goes through the gavel and it will clog badly. (personal experience)
 
I don't know about a million and one but as Jason said, out of those million people, only two of them that I know will tell you that is the way to go and I am one of them.
My reef is running for 39 years with this system.
If you find a system that can last longer with almost no maintenance, go with it.



Did you count all of these things?

Not all those crabs and snails are in one tank.....those are scattered throughout the 3 tanks we have which is a 55, 75 and 90. The tank I want to change is the 90 cause I would like to try something new as this one does not have a sump only a skimmer and canister filter. I would like to see the coraline alage grow better and faster....call me impatient lol. The alage that is in there that I call "FLUFFY" is so light and loose that I can wave my hand in front of it and it will blow away or fall off. It is not on my rocks only on the back and sides of the tank.
 
WI,How are your alk, mag and calc levels? All three are needed for coralline growth.

Paul, thanks for the explaination.
 
So it pushes detrius out? How does it trap waste? Or does it trap waste? If it doesnt trap waste how is it called filtration? I am not being a smart arse, these are genuine questions. I would like to learn.

Michael, those are valad questions and being almost no one uses this system I have to explain it often.
It does not push detritus out because there is very little detritus in it. The water is filtered before it gets pushed (very slowly) under and through the gravel. UG "filters" were called filters because when they were invented in the fiftees we used them as filters then we had to stir up the tank every few months to clean them.
In those days we did not have reefs and the dead coral skeletons we used were easy to remove. After we went to reefs, we did not want to do that any more so I developed this system after some years of experimentation.
I use a filter sponge on the intake and I rinse that sponge.
It is mistakenly called a filter like a protein skimmer is called a "protein" skimmer. It is really a foam fractionator. There are no proteins involved.
The reason no one uses UG filters any longer is the clogging I mentioned. The device is fine but the way we used it in salt water was flawed.
 
Yes but with a regular UG filter, you can't clean the water before it goes through the gavel and it will clog badly. (personal experience)

I saw a place trying to sell a UGF prefilter. It was a big thin sheet of polyfiber to lay over the UGF. I couldn't imagine having to constantly change that out. :eek2:
 
Thank you Michael.

Hello Jason, how is your RUGF doing?

I still have one large piece of dead coral skeleton in my tank left over from the beginning.
I just could not part with it.
I would love it if it were a live piece of SPS and at times it did look like it was live when it was covered with star polyps, but now it is just a plain piece of dead coral.
You can see it to the right below the fireclown.

Tank037.jpg
 
Ok I am going to give a heads up on what is in this 90 Gal tank so you all know. Protein Skimmer made for 120 gal, canister filter with a UV Sterilizer which I am not using at the moment (using canister filter but not the UV) the canister filter has bio balls, ceranmic noodles activated carbon and pre filter pads, 60 lbs of live sand, 40 lbs crushed coral, 85 - 90 lbs of live rock, 4 Hydoras, 1 flame angel, 1 koran angel, 1 blue/green chromis, 1 peppermint shrimp, 1 cleaner shrimp, 2 porecelain crabs, 2 pom-pom crabs, 2 emerald crabs, 1 shavers (painters) brush, 1 flame scallop, 1 gold banded coral shrimp, 100 snails, 125 or less crabs, 1 anenome, 1 250 watt heater. We feed our fish every other day with a 1/2 a cube of mysis shrimp. Chemicals we use are Reef calcium, reef builder in our refill water, Reef Calcium advantage that we use in our refill water every other time, reef complete, reef plus which these are all by Seachem. We have a RO/DI system which is a 6 stage unit. For testing our tanks we use API Master Testkit. We do gravel vacing and water changes every other week. The lighting fixture we have on the tank is a Nova Extreme T5 with lunars which is 430 watts with 8 bulbs (4 - blue atinic and 4 white). We use Instant Ocean Reef Crystals. We have airstones, heater and a recirculating pump in our 33 Gal garbage can that is brand new that we store our RO water in when we need it. Our lights stay on for 12 hours and then the lunars are running 12 hours as well.


Any and all help is appreciated to put us in the right direction.
 
Hello Jason, how is your RUGF doing?

Been doing great so far. I am having a problem fitting in the 25 year cleaning maintanance in my schedule. I'm book out at least 30 years right now.

Been playing with three new LPS corals and they seem to be doing really well. In the three weeks I've had them the blasto's have doubled in size and have three new heads on the duncan. Torch wasn't happy but he's perking up now that I have him in some moderate flow.

s42yqt.jpg


2u91enm.jpg


2crq5iw.jpg



Who really loves the RUGF are my mandarins and they would like to thank you personally Paul. Here they are posing for you.

2e0pz46.jpg
 
PH ~ 8.2
Ammonia ~ 0
Nitrite ~ 0
Nitrate ~ 0
Salinity ~ 1.024
Calcium ~ 400ppm
KH ~ 7 dKh
GH ~ 7 gKh
Copper ~ 0
Temp ~ 78 degrees
Phosphates ~ 0
Dissolved Oxygen ~ 6ppm
Redox Potential ~ 350 millivolts


these are the test results. The alage is "yucky" well in my eyes but it seems like the Coraline Alage is very slowly coming and for me it is growing to slow. I want a goregous tank that I can be proud of.

Oh I also forgot to mention the glass tops are not on the top of the tank anymore but there is alot of water current.
 
WISaltwaterLove, a half a cube of mysis does not seem enough for all of those fish along with those million crabs, snails and shrimp.
I would also eliminate that UV, canister filter (and everything in it) and most of those additives. You really just need calcium and nothing else.
It's your money and that stuff will not hurt, but none of it is needed. (Sorry Seachem)

Jason, my mandarin says hello. (picture is probably 10 years old)

CopyofGorgonians1005.jpg
 
I want a goregous tank that I can be proud of.

My tank is not very gorgeous, but I am still proud of it.
I am going for health rather than gorgeousness although having both is nice.
 
PH ~ 8.2
Ammonia ~ 0
Nitrite ~ 0
Nitrate ~ 0
Salinity ~ 1.024
Calcium ~ 400ppm
KH ~ 7 dKh
GH ~ 7 gKh
Copper ~ 0
Temp ~ 78 degrees
Phosphates ~ 0
Dissolved Oxygen ~ 6ppm
Redox Potential ~ 350 millivolts


these are the test results. The alage is "yucky" well in my eyes but it seems like the Coraline Alage is very slowly coming and for me it is growing to slow. I want a goregous tank that I can be proud of.

Oh I also forgot to mention the glass tops are not on the top of the tank anymore but there is alot of water current.

The Cap'n already has a good post for you in his log book thread.

http://www.reefcentral.com/forums/showpost.php?p=16916438&postcount=145
 
Paul ~ Could you tell me if that is too many hydoras or no or what we are doing wrong. I would really like to know what your thoughts and input is on everything since you seem to be very knowledgable in this area.
 
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