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  1. Tropical Fish Diseases
    Have long established 20 Gallon Tropical Fish Tank... SMALL FISH...3 neons, 2 hatchetfish, 2 Plecostomus (very small) & 3 swordfish. 2 weeks ago I added 2 small angels, clown loach & small redtail shark. Saturday...within a 12-18 hour time span...I LOST ALL BUT 1 of the swordfish! DOES...