Multiple AWC dosers on same line

[ReefHunter006]

Hi all,

I would like to increase the turnover for water changes in my large tank.

Has anyone got any experience running awc dosers on the same line to increase daily amount?

I have a 40 gallon brute about 8’ below my tank that acts as my water change barrel and a remote fuge/cryptic sump from time to time.

Right now I have a Neptune dose that does about 30 gallons through it a day. I would like to get more so I thinking on splitting the in and out RO lines and splicing in a second doser that would operate while the other was off. This would help minimize the lines running through the floor by letting two dosers use the same one.

I was worried this might cause pressure to build some how and blow one of the dosing heads.

Any thoughts or better solutions that does run additional lines?

 

[Johnd651]

Without seeing the lines, I am not sure what size, but they make check valves that you could put on each line prior to the tee so it could only go one way.

ESHIONG 1/4" Push to Connect One Way Check Valve for RO(Reverse Osmosis) Water Filter,NSF Certified Plastic Quick Connect RO Fittings (6 pcs) https://a.co/d/hrcOswu

 

[ReefHunter006]

Without seeing the lines, I am not sure what size, but they make check valves that you could put on each line prior to the tee so it could only go one way.

ESHIONG 1/4" Push to Connect One Way Check Valve for RO(Reverse Osmosis) Water Filter,NSF Certified Plastic Quick Connect RO Fittings (6 pcs) https://a.co/d/hrcOswu

Thanks, i thought these check valves used metal so they were suppose to be used with sea water.

Standard dosing size. 1/4”

 

[ReefHunter006]

Anyone able to confirm?

 

[Johnd651]

I think the teeth into the line are metal, not sure about the actual check valve.

 

[ReefHunter006]

I think the teeth into the line are metal, not sure about the actual check valve.

Yea, those are for sure. I recall seeing others on the forum not using them cause of a potential contaminate.

Anyone familiar?

 

[Sisterlimonpot]

Is this what you're asking?

This is 2 peristaltic pumps tied to the same inlet and outlet to take advantage of different rates throughout the day.

Because both pumps max effluent is 200nl/min. In theory, if I were to run them both at the same time, I could get 400ml/min.

There's no need for check valves because these pumps are positive displacement.

 

[ReefHunter006]

Is this what you're asking?

This is 2 peristaltic pumps tied to the same inlet and outlet to take advantage of different rates throughout the day.

Because both pumps max effluent is 200nl/min. In theory, if I were to run them both at the same time, I could get 400ml/min.

There's no need for check valves because these pumps are positive displacement.

That’s it exactly. Thank you.

Does positive displacement matter whenever the he pumps are 8’ below the tank?

 

[Sisterlimonpot]

Does positive displacement matter whenever the he pumps are 8’ below the tank?

That's a question that can't be definitively answered because hobby grade peristaltic pumps aren't necessarily the best example.

The rollers pinch the tube, so it doesn't matter where you put the pump, it's not going to siphon unless there is a major flaw.

You didn't mention what pump you're using, but chances are, if it's in good working order, you won't have a concern.

 

[ReefHunter006]

Ty, Neptune dos.

 

[Sisterlimonpot]

Ty, Neptune dos.

That's a good one that maintains good occlusion.

 

[BZOFIQ]

Because both pumps max effluent is 200nl/min. In theory, if I were to run them both at the same time, I could get 400ml/min.

Im pretty sure it doesnt work like that, did you do a bucket test to confirm?

One can only push so much water through 1/4" tubing without major pressure.

 

[Sisterlimonpot]

Im pretty sure it doesnt work like that, did you do a bucket test to confirm?

One can only push so much water through 1/4" tubing without major pressure.

Definitely, physical limitations of how it's being ran can hinder final results. Given the example, I have succesffully ran more than 400ml through an RODI simirigid tube. hehe

Early prototype of my peristaltic pump

 

[BZOFIQ]

Definitely, physical limitations of how it's being ran can hinder final results. Given the example, I have succesffully ran more than 400ml through an RODI simirigid tube. hehe

Early prototype of my peristaltic pump

I was talking about combining 2 pumps @ 200ml giving you exactly 400ml through a single tube.

 

[Sisterlimonpot]

I was talking about combining 2 pumps @ 200ml giving you exactly 400ml through a single tube.

I see what you're saying. Of course you have to calibrate to accordingly. Same thing would apply if calibrating 200ml/min through 2 feet of tube and then added another 10 feet, you're doser is no longer accurate.

 

[ReefHunter006]

It’s working for me so far. Going to try a third here shortly.