02-24-2011, 01:41 AM
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There are no fish in the tank. Were it me,(and it ain't),, I would perform a 80 percent water change,raise the temp to 84 to 86 degrees,(speeds up ICH life cycle) and let the tank run for a week to ten days with no fish.
With heat mentioned,and no fish to infect,,the ICH parasite along with most bacterial pathogens will quickly die.
At the end of ten days.I would perform another 80 percent water change and replace carbon, lower temp to 74 to 76 degrees which would suit the Danios, or any of the tetras I mentioned earlier in this thread should OP dedcide to place a couple three small fish in the tank to help establish biological filter.
Or I would consider fishelss method of cycling with fish food,or one or two small uncooked raw shrimp or mussles.Opinions vary but is what I would consider were it me.
I would NOT use salt on regular basis in freshwater system unless treating for ICH or if keeping mollies, which may benefit more from marine salt than tonic (aquarium)salt.
Platy's,Guppies,Swordtails,and mollies can and do thrive without it so long as water hardness is sufficient 12 degrees+.
Last edited by 1077; 02-24-2011 at 01:46 AM..