Originally Posted by itafx
By that logic, you wouldn't be able to have fish in your tropical fish tanks because there might be parasites. Also, it seems to me that dog do water would carry a hugely higher risk of introducing bad parasites than a clean pond with healthy fish.
There would be no fish parasites in dog do water. I wouldn't put that water in my tanks either. As far as transferring parasites from one tropical tank to another, that is a real possibility. Hence, the use of a quarantine tank. Fish parasites live in water with fish, as they can't survive without them.