automatic water change

rps3 said:
Hey Chris, the tubes might need adjustment. Sometimes when they are installed, the tube set anyways, one could easily get more stretched then the other. My method of "adjusting" the tube set was by pulling the one that was out putting more. This takes away slack on the line.

That's how I did it with the masterflex set up. No matter what anyone says, heads will run the same but the tubes will always need to be adjusted.
Click to expand...

Thats a good point Eric. On the Stenner opening up the heads to adjust the tubing is very simple. This pumps is like AWC for dummies. Its all very easy to work with.
 
well, I can get my $100 back, if I send back the pump. I don't want to send back the pump, I want the other 3 I should have gotten!!

$100 is still a decent deal, though no where as good of a deal as $25/each- not sure what I'll do.
 
iced98lx said:
well, I can get my $100 back, if I send back the pump. I don't want to send back the pump, I want the other 3 I should have gotten!!

$100 is still a decent deal, though no where as good of a deal as $25/each- not sure what I'll do.
Click to expand...

Dude- get your $100 back and buy a Stenner. These things will last decades hence no need for another one. All will be included to do AWC. Its only another $170.
 
iced98lx said:
well, I can get my $100 back, if I send back the pump. I don't want to send back the pump, I want the other 3 I should have gotten!!

$100 is still a decent deal, though no where as good of a deal as $25/each- not sure what I'll do.
Click to expand...

AquamanE said:
Dude- get your $100 back and buy a Stenner. These things will last decades hence no need for another one. All will be included to do AWC. Its only another $170.
Click to expand...

Listen to the Señor, he is correct. Spend the money and you'll get everything needed in the box.

Eddie, you got an extra set of tubes and two of those weighted strainers?

Sometimes shortcuts are good, but consider this another part of life support for your system, that and a back saver. LOL
 
Ok so I tried my stenner for about a min and noticed a ~8-10ml difference between
the two heads. Any ideas? Tried at the pump with about 3 ft of tubing to eliminate the problem being down stream
 
Chris155hp said:
Ok so I tried my stenner for about a min and noticed a ~8-10ml difference between
the two heads. Any ideas? Tried at the pump with about 3 ft of tubing to eliminate the problem being down stream
Click to expand...

Adjust the tube set Chris, don't make me drive down there to do it for you! LOL
 
Found a confirmation on the Stenners on how to adjust the tubes to output the same amount. This applies to all dual head systems as I've said earlier in previous post. LOL, I sound like Eddie all of a sudden.

Just reading about it on Wikipedia "The minimum gap between the roller and the housing determines the maximum squeeze applied on the tubing. The amount of squeeze applied to the tubing affects pumping performance and the tube life - more squeezing decreases the tubing life dramatically, while less squeezing can cause the pumped medium to slip back" - so it seems if not tight enough I can get 'slip back', I guess that is what is happening very slightly on one side, they are not easy to adjust so I guess I didn't get it just right. Thankfully I have a few spare tubes.. lol..
Click to expand...

http://www.thereefuge.com.au/threads/stenner-170dmp5-dual-head.8921/
 
rps3 said:
Found a confirmation on the Stenners on how to adjust the tubes to output the same amount. This applies to all dual head systems as I've said earlier in previous post. LOL, I sound like Eddie all of a sudden.

http://www.thereefuge.com.au/threads/stenner-170dmp5-dual-head.8921/
Click to expand...

For those using Cole-Parmer Masterflex pumps, this is referred to as "occlusion." Some pump heads include a variable occlusion function where it can be adjusted by turning the top knob as seen below

 
Soooo how is this done on the stenners? Are the peristaltic tubes pulled tight against the rollers before there opened up against the rollers?
 
No, they are fine how they are, just pull slightly on the one moving more water and test the dispense rate.

Now I have to get me one of those flow meters like you have on yours as well. Thanks a lot. LOL
 
So I got my float switch mounted and wired up ready to connect to the RA. I attached it to a tee that will plug into the open piece of pvc from the level guage on the mixing container. I drill an extra hole to run the 1/4" line through. It sits nice and secure in there and I can make sure that the end is always below the float switch. I soldered the float switch wires and sealed them inside some airline tube with silicone. It should hold up pretty good.

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I thought you were using the water level sensor to control level.

What is the pipe (1/2" I think) on the last picture for?
 
I am building up slowly. For now at least i will just have a backup switch. At some point I'll add all the extras. The smaller pipe is for a site level to see how much is in there.
 
rps3 said:
No, they are fine how they are, just pull slightly on the one moving more water and test the dispense rate.

Now I have to get me one of those flow meters like you have on yours as well. Thanks a lot. LOL
Click to expand...


Lol sorry it's a good for piece of mind. I got mine from grainger but eBay had the cheapest if I remember correctly.
 
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