10 gal QT tank 0 ammonia, 0 nitrite, 10 nitrate. Aquatech 5-15 HOB filter and a sponge filter, bubble bar. Sand substrate with an anubis and java fern and a couple of clay pots. Has been up and running for several months, fed with ammonia, weekly water changes, stirring the substrate etc. I added 5 small serpae tetras and 3 small peppered cories yesterday and all seems to be going well. All ate this morning and I tested the ammonia and it is still 0. A few questions: I have Paraguard and have read that it is a good idea to treat new fish for parasites JIC. If this is a good idea, when should I start treating and for how long? I assume I should test the water daily to make sure that the parameters remain good while the tank adjusts to the new bio-load. About how long do I need to do that? I intend to keep them in the QT tank for a month. Thanks for any advice!