only if you add so much where you reduce the oxygen levels to much and choke out the fish. this is why a drop checker comes in handyalexpie001;4305932;4305932 said:wow thanks so much for your help. Could too much co2 kill my fish?
Yes theoretically but unless you have a cheap way of getting tons of sugar then it's going to end up costing you more than a pressurized co2 system very quickly. Take it from me i tried it on a 150 gallon tank and i figured to prodcue significant amounts of co2 (5-6 bubbles per sec) i needed 6 2 liter bottles (at least) think about how many more bottles you will need on a 220 gallon tank maybe 9 or 10 total. And then think of all the sugar you will have to use it'll end up costing more than the whole pressurized set up within a couple months.alexpie001;4305899; said:any way possible i could make diy co2 big enough for a 220?