No you can stick with 25ppm (How are you measuring this BTW, via a drop checker? If so what Kh is the water in the drop checker?).Arana said:Thanks Eds, best to leave it alone then... i hsve adjusted my Co2 levels to give me about 25ppm hence the PH of 7 i'm not too concerned about the PH is this what you meant? would 30ppm be a safe level for a well stocked tank? i'm more than happy to turn it up a bit if it's safe.
It is possible to kill your fauna with too much CO2. Whilst the CO2 does not displace the O2 levels, fish need the CO2 concentration in the water to be lower than their metabolic levels, otherwise they can`t rid their bodies of waste CO2.Frolicsome_Flora said:Gas damage to fish isnt caused by co2, its caused by LACK of O2, adding co2 doesnt replace O2.