Fast Fish Deaths

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Fish Crazy
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Nov 30, 2005
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houston TX
I have had my tank now for about 10 months. It is a 30 gal. with a bio-wheel filter system for a 50 gal tank, and 150 watt heater. Ammonia 0 ppm, nitrate 0 ppm, nitrite 0 ppm, ph 8.4,alkalinity 300 ppm, saltinity 1.022. I started it with 15 pounds of Fiji live rock,5 blue leg hermits,5 narcissus snail, and Two false percula clownfish. the tank cycled with no problems. fish ate alot and looked very happy. after about 4 months i added some green star polyps, and another coral i dont know the name of. about a month after that i added a coral banded shrimp. fish still ate alot and looked happy( with the exception that the coral banded shrimp is territorial with its rock, and dosent let the clowns get too close to him).
the next two months the clowns were just fine. one day out of nowhere the dident want to eat. not flake not pellet, not live brine shrimp (there favorite). i dident think of it much since some days they ate more than others. well this went on for a week. the looked really skinny, and i noticed rapid breathing that never stoped. i could see there bones. but other than there weight loss no other visible changes.. no spots or anything that "i" could notice. then after a week and a day one died. the other followed the next day.
while all this is going on all the other life in the aquarium is looking great . well two months passed and no one i have talked two "in fish shops" can give me a good reason why. they say bad water well if that were so, the corals and shrimps would be the first to die. Plus i check my water weekly and change my water weekly.im thinking its some kind of bacteria or something??? im clue less. So the next thing i did after 2 months the clowns died is bought a peppermint shrimp and a damsel (because is cheap and "hardy") . when i put the damsel in the tank it was excited swimming happily. i feed it some flake food and it went nuts eating it. the next day it dident eat as much. the third day it dident eat at all and had rapid breathing. it died that same third day started swimming sideways and upsidedown.all 3 fish died the same way. yet the peppermint shrimp coral banded shrimp , corals and hermits are all doing extreamly well since day one.
All i add to the tank is a ph buffer, liquid calcium, and purple up for the growth of coraline alge. i hane added these since the first day. and add them only acording to directions.
SOMEBODY GIVE ME A CLUE.
 
Well, to start off, you should cycle SW tank with fish. If you would, the LR does that for you.
Secondly I think your ppm is too high, and you SG is low. Ususally people have more salt than that.

I know this doesn't help much, but i'm a begginer in SW, so this is just my estimatey type answer.
 
Why did you dose your tank? What was the calcium level before and then after you dosed it? What water are you using in your tank? Something is killing them and it doesn't sound like bacteria? Are there chemicals near the tank? SH
 
I see nothing significantly wrong with your levels. The clowns were in there a long time, but maybe they had something like a little too high ammonia at the LFS for a while, and maybe just took and extra long time to have an effect. Maybe one of your corals brought in something wierd that is poisonous to fish. Id just start out fresh, maybe sell back those corals and recycle everything. Im so sorry, if your like me and my family, u probably got attatched to those clowns, they are just so appealing. But maybe the next time you get something from the LFS, check their parameters and see if there is something wrong with their water.
 

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