01-28-2007, 12:16 AM
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The blood worms wont cause any ammonia problem, what will cause the ammonia problem is the poop the fish makes after eating the bloodworms.
You have a good filter but your mistake is that you are using zeolite (the stuff that takes out ammonia in your filter). Instead of using this method (which you should stop using right now) is to do a large, 50% water change with no gravel vac.
You dont need to hospitalize the danios, it isnt an infecsious disease so your other fish will be fine, i would recommend a salt bath though.
Zeolite is bad since it starves the good bacteria causing you to cycle again.