I recently acquired a 30g tank secondhand that came with the top cover and a light. I cleaned out the tank, bought a filter and air pump (both tetra brand) and a rock substrate. I also got 4 live plants and a piece of driftwood from the local fish store. I went out and got some feeder goldfish to get the tank 'jump started' and speed up the whole break-in cycle. However, I realize I was a little too hasty in the entire process. I believe the fish have an Ich breakout as the majority of the fish are holding their fins close to their body, have trouble breathing, are twitching occasionally, and one of the goldfish has extensive white spots all over its body (including the eye).
My main concern now is that the ich will attach to the plants/driftwood and any future fish I add to the tank (once everything is settled and ready) will be infected. What would you do in this situation to try and preserve what is in the tank now?
(I realize I made a big mistake doing all of this so quickly so please keep comments constructive. This is my first tank and well I got a little excited. Lesson learned.)