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blue tangs turning white
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Joined: 07 Feb 2003

PostPosted: 2003.05.19(Mon)5:31    Post subject: Reply with quote

Having 3 tangs in a 55 is not a good idea. Tangs can become very terrirorial especially if crowded together and this can cause major stress. Tangs are a more delicate fish and stress can be the root of diseases in these types of fish. Also if your switching there diet which is a good idea they need lots of greens with the diet. A varied diet also helps against ick and hole in head disease which they are very sucepptible.

Water conditions are kept 78 deg., pH 7.5-8.5, ammonia, nitrate, nitrite are all in the normal to low acceptability with very little fluctuation.

Your pH needs to be stabalized 8.2-8.4 is where you want it. You say the other parameters have very little fluctuation. In ammonia and nitrite it should be no fluctuation and remain at 0. Any showing of these 2 in a tank can easily affect a fish like a tang. I'm curious how old is this tank? A saltwater tank actually takes at least 6 months to a year to be considerd fully mature and tangs should be added at least after the 6 month mark. This is the time when your tank will fluctuate the most.

I agree your pH problem may be an alkalinity problem. You want your alkalinity 9-12 dkh. Alkalinity and pH actually work together you can't have one without the other. Once you get your alk stabalized chances are your pH will stabalize also. It may sound weird but putting a saltwater fish in a low alk water is actually like putting it in an acid bath and can have a huge affect on the fish.


Are you keeping your tangs in a 30 gallon? Nothing under a 55 is reccomended for a tang and thats certain species other types you should have at least a 75 minimum for. Tangs are big swimmers and can be very territorial and or stressed if kept in a small tank.
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