I have recently been given 5 baby catfish and I was advised by the pet shop to buy Plecostomus tablet food but it's making the water cloudy. Have I been given the wrong advice and would food do you suggest I buy?
You said you have baby catfish, but not what kind they are. Are they plecos or something else?
In any event, you need to do extra water changes and bottom vacuumings to remove any food that has not been eaten. Bacteria that could harm your fish will be eating the leftovers and will increase in number. It's very important that you do not let this happen.
I had a funny feeling you were going to say corys!
Depending on their size, you might be feeding them too much. And, while the pleco pellets won't hurt them, there is better things you can give them.
Corys should have a good quality flake food that is high in protien. Another thing that is very good for them is blackworms, bloodworms and/or tubifex. These come live, frozen and freeze dried; they will love them all. I would avoid Wardley's Shrimp Pellets which used to be a staple in corys' diets, but these day has too much ground wheat in them.
Enjoy the little corys. They are fun now and you can look forward to having fry of your own within the year.