So my gfs parents had their house fumigated and I took all their fish (Fw) and put them in my quarantine tank. I forgot to tell them to seal the tank and it was totally open. Are fish good to go back in right away or is there something that needs to be done. I was figuring a 100% water change would be fine but wondering if all the rock and gravel would be contaminated

They are lucky to have you!!

