I added 5 Mollies (2 black & gold marble, 2 silver) to my 10g tank about 3 weeks ago. Ammonia and nitrites were both 0 before I added them and have remained so....
A few days after I added the fish: ph
: 7.4/7.8, kh
: 6, gh
1-2 weeks later - ph
: 8.2, kh
: 8, gh
Fews days old tap water - kh
: 11 gh
I've done a parital water change every week also.
Why did the ph
go up? And is the ph
too high for Mollies?
I have 3 plastic plants, one small ceramic ornament and one rock type castle that I bought in the lfs
. (Could the castle be increasing the hardness?) It has brown algae on it but only on the side facing the front of the tank. There is some brown algae on the glass too but not much.
I've also noticed that the marble Mollies have become aggressive mainly towards the silver ones and sometimes each other.. swimming at them like torpedos!! Other than this they all seem fine.
I'm afraid I'm not feeding them enough though as I'm wary of overfeeding.... could this be why they are becoming aggressive?