Hi guys! My 25 gallon tank is approximately 3 months old. For the first couple months the ph was a steady 7.4. in the past few weeks the ph is testing around 6.4. and i dont know why. It is a moderately planted tank with moderate lighting (25 gallon/ 65 watts) and no co2. I have lost a couple fish due to ich and had to increase the tank temp but replaced the fish soon after and tried to keep everything relatively stable. I've never had ammonia or nitrites and nitrates have never exceeded 20ppm. Can someone please explain if a decrease in ph normal at this stage, why my ph has changed, or if i should be concerned...? I did leave town for a few days so the lights were off but i made sure they got extra sunlight during that time. The ph has remained low since then even though i am now back on the regular lighting schedule.
Thanks!
Rochelle
Thanks!
Rochelle