I was doing a water change on my 55 gallon tank today and I noticed the poo had some white color on it....Is it from over feedong or becuase of a parasite?
White stringy poo can mean an internal parasite, try a shelled pea if still having long stringy white poo, you will have to medicate with an internal parasite med.
If you have frozen peas in the fridge, take some out and defrost them. Remove the first shell then pop out the squishy stuff inside. i chop the squishy stuff up really finely so my fish can swallow it better.