i would like to offer a different opinion. I have a 210 gallon, was running cerges reactor on a big water filter housing. Hard to keep co2 stable with sump and open tank. I felt more co2 was gas off. Was running out of co2 within 1-2 months, gets tiring have to refill it often.
Also, plants were growing faster than I would like to maintain.
Now, I'm going really low maintenance with some tall plants like vals, no co2, and some foreground plants.
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