loss of colour is often a stress reaction - if you are water changing daily this could be stressing them. If it was me I'd turn the lights out for a couple of days and see if they colour back up. If they do then it's due to stress and not an illness.
Regarding re-homing or adding to their number - well adding to their number will also help de-stress them and re-homing them will add to their stress. I know which I'd do but it has to be your decision
Regarding re-homing or adding to their number - well adding to their number will also help de-stress them and re-homing them will add to their stress. I know which I'd do but it has to be your decision
