A couple of weeks ago I got rid of all my african cichlids and turned my tank into a planted/tetra tank. The penguin tetras have been in the tank for almost two weeks, the neons for almost one. Over the last 3 or 4 days I've lost 10-15 of my 30-35 neons, and 4 or 5 penguins... They all seem very active and eat good, but slowly but surely they are starting to die.
110 gallon tank
PH = 7-7.2
Nitrates = 0-5ppm
Nitrites = 0ppm
Ammonia = 0ppm
Temp = 76-78 (I just lowered all the heaters to 70...so the tank will end up room temperature, which is around 75)
The hardness is probably the issue....it's in the 22-25 dGH level...which is where my tapwater seems to be.
I've been to every local store around here that sells fish, and NONE of them sell anything to adjust the hardness. Guess I'll have to order it online.
I guess my question is this.....is the hardness level really that important for neons, or is something else killing them off? I need to figure this out soon...
