As psr tof the displays in my room I have a 25 gallon fresh tropical tank - it has a few guppies, swords, mollies an angle fish and some submerged plants. The plants aren't doing very well. any suggestions?
I think that I would like to try a CO2 system, but know next to nothing about them. How much CO2 should I be adding? Will it affect the fish?
Any advise would be great.