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Discussion Starter · #1 ·
Ok a little about my tank.

Its a 55g tank, with a fairly heavy fish load(that i am working on lowering) the Nitrates run high without dosing(around 30 to 40 ppm on the last test) due to the fish load.No fert Dosing at this point, and Lightly planted(working on getting more plants but money is extremely short in supply)I have a T5 unit over it that will support 4 x 54 watt bulbs.

My question is this, at what point does CO2 become required IE what wpg requires pressurized co2?

4 bulbs = 3.92 WPG
3 bulbs = 2.95 WPG
2 bulbs = 1.96 WPG
1 Bulb = .98 WPG

Basically How many bulbs can i run before i Absolutely must have pressurized co2?
 

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