Able to put fantail after treatment? please read, plz thnx :)?

okay, so a week ago i added a sizzly ick-clear tablet medication i got from walmart. the water turned blue right after but then cleared up after a few hours. so besides, im thinking about getting another ryukin. is it okay to put it in? i did a 50% water coppers today and the meds. stained the corners of the tank. so is it safe to put contained by a new ryukin after the meds i put in a week ago? the water is adjectives clear now, remember that.
Answers:    How big is your tank? Two ryukins need a minimum of 30 gallons. If your container is big enough and there are no signs of ich, it should be okay.

[edit] Again, how big is your tank, as surrounded by how many gallons? What are your water parameters (ammonia, nitrite, nitrate)?

[edit] Your reservoir is too small for even one goldfish, never mind three. And your ammonia is at a toxic level--you need to do a 50% water rework ASAP. Your pH isn't important (and also isn't 0, so you seem to have tested it wrong).

Your fish want a 40 gallon tank, because they're going to get very huge. They also produce a ton of waste, so you're going to continue to have river quality problems until you upgrade.
Goldfish surrounded by fish bowl back?   Please minister to 10gal cistern recommendation?   What adjectives aquarium plants come from South Brazil, Paraguay and Uruguay?   HELP TO MUCH INFORMATION, every site speak something different just about glofish?