My marine fish died from ich. How do I prepare the tank for new fish?

Question

Hi, Got a marine fish tank 120L. The blue tang got white ich a week back and it died and post that within a week all the other fishes died. Had a pair of clowns and various damsels. Now with no fishes in the tank, what should I do next? I plan to get the water tested and plan not to add any new fish till 2-3 months? Anything that needs to be done during this phase? I have switched off all the power and filter in the tank. Thanks, Milton

Angel Alvarado, LVT · Accepted Answer

Ich (Cryptocaryon) is an obligate parasite. This means it needs fish to survive. If your tank has no fish, continue to run the filter and tank empty for at least 6 weeks. You can increase temp to about 86 F to speed up the life cycle of the parasite. If your tank is not a reef tank and has no inverts, you can treat the tank with copper. Once treatment is complete, decrease temps to normal ranges. Continue to monitor salinity/chemistry. Quarantine any new fish for at least 10 days in a bare bottomed, established tank to prevent re-introduction of parasites into the main tank.

My marine fish died from ich. How do I prepare the tank for new fish?

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