Hi.
I am a new aquarium novice, with 54 litre tank, which holds a total of 23 fish, as follows:- x2 Rasbora Hrlequins.
x7 Neon Tetra.
x5 Lemon Tetra.
x6 Rosy Tetra.
x1 Panda Cory.
X1 Bronze Cory.
x1 Spotted Hoplo.
50 watt heater and Fluval U2, which I have a terrible habit in changing the 3...