Greetings! I have just bought a second-hand Interpet Nano 19L tank with a view to my first foray into aquatic plant cultivation. (This is probably going to be the first of a load of noob questions, so thanks for your patience )
So - can anyone kindly help me to understand what is this thing that came in the tank? I am doing a descale and don't want to upset the chemistry of whatever it is. (Please see attached picture)
So - can anyone kindly help me to understand what is this thing that came in the tank? I am doing a descale and don't want to upset the chemistry of whatever it is. (Please see attached picture)