3rd chamber on CO2 reactor?

[Werbo]

First off I've never worried about ph and chasing numbers. That being said.... I added a TLF reactor I had lying around with fine ARM media. Modified the input and output to 1/4 John Guess fittings. Media in TLF reactor needs a top up every time I top up the main chamber with coarse media so there is sufficiently low ph to dissolve the fine ARM media.