Check the listing for details. NT LABS CHLORAMINE T 250g. Bacterial Disease. Koi Pond Fish. Condition: New. Listed at 34.15 USD. When fish show symptoms of a bacterial infection (ulcers, fin, tail or mouth rot, loose scales), parasitic infection (Costia, Trichodina, skin or gill flukes), flicking and rubbing against rough surfaces or gasping. Mix the appropriate dosage in a clean bucket of pond water and pour evenly over the surface of the pond. Switch off UV filtration until 48 hours after adding the final dose. Aerate the pond well during treatment. If you feel a repeat dose is necessary, check your diagnosis, a different medication may be more suitable. Allow 10 days after adding the final dose and perform a partial water change before re-treating or treating with a different medication. Please bear in mind it is dispatch time and not delivery time you are marking us on. We do our best to offer you a 5 star serv.