Well my tank just started looking great, fully cycled plants all doing well in high tech 10 gallon planted tank. Long story short. I did not quarantine my only fish ( serpae tetra) similar to bleeding heart ,because originally my planted tank was going to be my quarentine tank for a much bigger display. I did fully cycle a 10 gallon fishless tank on the side which is just running with no livestock. My one lone tetra has had a scratching problem that I could not figure out for months even after dosing prazi thinking I had flukes & they would just go away after using prazi. Turns out using the flashlight trick I found the VELVET right away tonight. The question is, besides never bring in fish without QT again , can I medicate the fish in a hospital tank & let the tank sit for say 30 days with NO fish & the velvet remaining will die off in the planted tank. The tank has snails & 2 shrimps doing well. Will the snails or the shrimps become hosts or carriers of the disease? Second question: What is the best medication for the hospital tank??copper Sulfate , Quinacrine hydroxide. Plus I believe it can travel to the intestines so a de wormer may be in order. This looks pretty bad, should I bust the tank down? I believe medicating the whole tank is not an option because the meds for velvet are hard on planted tanks. There is the temperature trick to speed up the life cycle & turning the lights out. Not sure how effective that option is? I put much effort into this system & it is stable & growing otherwise? Best advice, thanks.