Honestly, I haven't had any issues with Petco, just be more selective when first picking them out. Make sure they look healthy, make sure they're swimming normal, no torn fins. Always ask if they can throw some food in to make sure they eat. Sometimes they'll throw in flakes, but I've never had anyone say no, if I ask them to throw some frozen foods (to mimic the diet in my tank).
Make sure the tank size is suitable and tankmates are compatible before buying. That'll minimize majority of the stress. A healthy, stress-free, happy fish should be able to resist and fight off ich by itself. Feed a healthy varied diet that's natural to them, supplement with nori, meaty foods, flakes pellets.. etc.
Make sure the tank size is suitable and tankmates are compatible before buying. That'll minimize majority of the stress. A healthy, stress-free, happy fish should be able to resist and fight off ich by itself. Feed a healthy varied diet that's natural to them, supplement with nori, meaty foods, flakes pellets.. etc.
