DIY Magnesium and Phosphate reactor for the calcium reactor

[Chin_Lee]

My problems with calcium reactor:
1) media releasing phosphates
2) I want to increase Mg but don't want small Magnesium granules clogging up my calcium reactor which is filled with large coarse calcium reactor media
3) effluent decreasing pH

Here is my solution for the above: a dual chambered Two Little Fishy Phosban reactors each on a closed loop. Chamber 1 accepts the effluent, Chamber 1 is connected to Chamber 2 with JG fittings, Chamber 2 ejects the effluent into tank.
Theory behind this setup is when effluent enters Chamber 1, phosphate is removed. When effluent enters Chamber 2, the low pH acidic effluent will dissolve the Mg granules and use up the excess CO2.

The results so far:
the immediate effluent pH out of Calcium reactor was set at 6.5 +/- 0.1
the effluent exiting the dual chamber set up now is 7.8 +/- 0.1

Overall image


Pic of the top of the two chambers


The trickiest part of this set up is knowing where the air bubbles will travel - air bubbles are inevitable so you need to manage them accordingly. You do not want them to be recirculated in the closed loop so you need to insert a hose on the hole for the pump input so the intake is lower than the air bubbles. In Chamber 1, you need to divert the air into the second chamber by cutting a slit or hole on the JG fitting just below the cap.
In Chamber 2, you need to divert the air into the tank so you can also do this by cutting a slit or hole on the JG fitting just below the cap.
You also need to install some valves (the ones from the mini irrigation systems work well) that will let air out of the closed loop hoses.

Hope this gives some people some idea on what they can do to improve their calcium reactor effluents.