I bought two Kribs to day - at the shop the female was quite a nice colour alhough the male wasn't I asked to swap them but he said they are al the same. Anyway they are losing colour and the female isn't that red anymore - why is this - I really want them to have a spectacular colour - how could I make them happy to give them good colour, the female -s about 3 - 4cm and the male abou 4 -5, I am really devastated as I've alway desperatley wanted them - the tank is a 15 gal with only 2 guppies annd has been cycled - but there was a little nitrite. y new 240 litre Rena aquarium has arrived to day so once it has undergoon a fishless cycle - can i put them in there alongside another pair - than you very much!