Hi there

Thanks a lot for getting back to us. We haven't got a test kit, I'm afraid, though we haven't topped up the water for a few weeks, so maybe that might be a problem.

The tank is 45cm wide x 25cm high x 20cm deep. It's a Rena one as far as I remember, with a lid. The filter is electric and has a sponge bit inside.

We bought the tank and fish in September, and while I'm not sure what you mean by 'cycling' the tank, we did treat the water and gradually acclimatised the fish over a few hours by mixing the tank water and the water they arrived in, as instructed by the fish shop.

We've attached some pictures of the fish (poorly one stil not looking good; swimming on its side, which can't be right) so hopefully you can ID them. They're not big; only a few cm. I seem to remember the chap in the fish shop said they were pretty low maintenance and hard to get wrong, which seemed ideal for a first step into fishkeeping. I do feel sorry for the little blighter.

Pictures are here

Hope you can help.

Thanks again

Sarah