Thanks!
I'm learning a lot as time goes by. They've been moved to a bigger (55l) tank now and I reckon we're more or less good for now. (until I can justify a bigger one for some Melanotaenia boesemani)
Here's some video I shot yesterday featuring Sidney the Swordtail supervising his tank...
Halloo
I have just recently started up my tank. I realise it's a bit small, a 24 litre Pets at Home tank that came with a filter. I have cycled it using advice from a reputable fish seller (Tall Trees in Nottingham) and I've got a black berlin Swordtail and a coffee and milk Platy in residence...