http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=help-what-it-is-#1 the gil seems like sparking, it is inflamed gil? how to cure? the gil are drop/missing and the next day appears blact spot at that place and fin and tail. what it is? ammonia burn? how to cure? lazz 2009-03-19 http://forum.aqua-fish.net/?topic=help-what-it-is-#2 Sounds like ammonia burns to me, the best thing to do is perform a large water change and when you add the fresh water, put some ammo lock or high quality water conditioner in there mickey 2009-03-19