single pass calcium reactor

[Bidadari]

I'm toying with an idea for my 3rd DIY calcium reactor being a single pass reactor. The idea is to have co2 injected into a "close loop". On the low pressure side of the loop, there is connection for water inlet and co2. On the high pressure side of the loop, it is connected to the media chamber which would flow bottom up. So essentially, the reactor is a single pass through the chamber.

The pressure differential (between pump output vs input) in the loop is regulated through a gate valve, and the differential pressure would regulate water input and output rate which all powered by the close loop pump.

So what I think is the advantage of this design is:
1. A single pump powering and controlling feed and effluent rate.
2. Fast equalibrium due to small volume in the loop, allowing reactor to be turn on and off using timer.
3. Low ph in the loop, keeping pump and gate valve clean
4. (Hopefully) very fine adjustment for feed and effluent rate
5. Constantly recycling co2
6. Easy for DIY; the reactor only need bottom input and top output. Any water filter canister, phosban reactor could be used for it.
7. Small pump... save on electricity

Any comment or suggestion for things that I have not think of?

Thanks!

 

[Kirin1]

Pics and Plans, Pics ans Plans!
This sounds kinda similar to the Stony Reef CA reactor, I realy want to see how you procede!

 

[H20ENG]

It will work!
My buddy at another public aquarium used on like this on a 10,000g reef system. (created by Jack Jewell for those who know public aquarists) The CO2 mixing chamber was clear so you could see the gas / water interface. Due to the slow flowrate, the CO2 was absorbed enough to drop to the nec. pH. NO recirc pump needed. The media chamber was about 36"H x 3" pvc.
Do It!