I have a co2 natural plant system that i bought at the store. it says it only for a 20 gallon tank but i got it anyway after having trouble with diy co2. i have a 46 gallon tank. would it be too much to have both the store bought one AND my diy co2? i just finished rebuilding my diy system but i wasnt sure if i could use both or if that would be too much co2