I have two 10g with cory fry (grow out tanks that have been cycled for over 3 months that suddenly had a ph crash to under 6 and ammonia/nitrites skyrocketed. 10% water changes have been done twice weekly at a minimum and my tap water usually is ph 7.4+.
The first 10g crashed a week ago, but the other 10g was OK. I pulled an AQ 50 off of the 40 to cycle it again quickly and did many water changes, it is stable now, but the other 10g now crashed.
What could cause something like this to happen over a period of a few days. Each tank had about 20 cory fry around 1/4 to 1/2 inch. One 10g is well planted and the other is bare bottom with a bunch of floating Water Sprite.
I have a 20 cycling to put them in, but am now in a rush because the second 10g crashed like the first did and do not have an extra seasoned filter. I am alos concerned witht he very low PH and acclimating the fish from a tank with a 6 ph to one with a 7.2 ph.
Cannot put them in the 40g because the Bolivian Ram tries to eat them.
The first 10g crashed a week ago, but the other 10g was OK. I pulled an AQ 50 off of the 40 to cycle it again quickly and did many water changes, it is stable now, but the other 10g now crashed.
What could cause something like this to happen over a period of a few days. Each tank had about 20 cory fry around 1/4 to 1/2 inch. One 10g is well planted and the other is bare bottom with a bunch of floating Water Sprite.
I have a 20 cycling to put them in, but am now in a rush because the second 10g crashed like the first did and do not have an extra seasoned filter. I am alos concerned witht he very low PH and acclimating the fish from a tank with a 6 ph to one with a 7.2 ph.
Cannot put them in the 40g because the Bolivian Ram tries to eat them.
