So, ds is quite sensitive and after a little mate (starting jnrs, scared of things with claws) and dh has bought a starter fish tank. Aaaaaargh! Sat here as you have to set it up before you can buy fish and its too difficult! In the pet centre (you have to take a water sample in before you can buy a fish) they said top up with water and this stuff once a month, I think. Now the instructions say weekly and there's a filter and two types of solution.
I can't do this!