Well i upgraded!!! I was having a time keeping up with my calcium demands, so I got a new CAC dual cahmber reactor, reverse flow on both chambers, both chambers have a 1/2 pipe connecting the bottom of the second chamber to the top of the first. It is very CO2 friendly, even the first chamber has a slight cone to it to gather CO2 and send it back to the front of the Maf 3 via venturi. It is has dual 6 inch chambers that are 21 inches tall. Constructed out of 3/8 acrylic, nitrile O-rings, nice keyholes, figure eight design to hold both cahmbers in place.Now pics.
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next to my old MRC-2
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next to my old MRC-2