I tried to put some photos on but due to being technology challenged it looks like they are on sideways...lol.
Anyway, I have 4 tanks, each one 40 litres. Neocaridina shrimps...only about 1 inch in size, so snack size for most fish. I don't keep any fish now, only shrimps. A tank of reds, one of yellows, one of blues and a cull tank where any poorly coloured specimens retire to. The cull tank is the most populated. Each tank runs on a little sponge filter, the bioload of the shrimps is very light. Each week I change a coffee mug amount of water from each tank, using the water remove