fish disease.

Pea-brain

In Memoriam
Okay, I have recently gotten some fish. They were 3 mollies from petco. I acclimated them about four hours to my ten gallon saltwater. Its been about 2 weeks. They have been eating well. I know it is overstocked but my tank is handling it very well. Ammonia-0. Nitrite-0 nitrates- less than 20 ppm. I do weekly water changes and have a PH of 8.2 . I use coralife brand saltwater. Tank temp-78 degrees. Salinity is 1.021. These are my first non-feeder fish (my hope is for them to breed so so I can feed the babies, who will hopefully be more nutritious than FW fish, to my mantis shrimp) The tank has about 8 pounds of live rock and a 5 inch sand bed. They are very active and eat well. I feed them freezedried krill ground up, wardley brand flakes, and wardley brand spirulina algae tablets soaked in selcon. They have been relatively peacefull with eachother and I have seen them chasing eachother, but I assume they are trying to do "it". The problem is that there tailfins are slowly disintegrating. They are there, but it is like they are becoming thinner and thinner. From a distance they look fine and full, but upclose the fins look almosttransparent. and the second problem is fuzzy white spots in all but ones mouth area. Like I said, they are eating well. I thought it might be cotton, but It seems that is usually on the fin. There have been no fish in that tank for about 2 months by the way. I tried to get pics, but my camera sucks and the fish move too fast. Also, what does molly mating look like? I've seen a variety of diff. behavior from fubbing their side together and swimming arouns in circles (head-to-fin) to picking at eachother anal fins gently..... Anyways thanks for the help.

Dan
 
Im not sure there are SW mollies. Are they chromis ?

Also 7 lbs of LR is way to low. At night the fish will find a spot to spend the night and if the spots are limited then they will fight for the best spot. The best spots mean a good nights sleep.

And the salinity level is a little low. 1.024 would be alot better.
 
They each have their own spot. The largest, a male, gets the left rock pile/cave, the largest female gets the middleish-rightish cave/rock pile, and the smallest female hange out in a small rock pile right next to the heater. Most places recommend a salinity 1.020-1.025. I mix to the specified salt level on my salt mix for 1.021 and my hydrometer reads 1.021. I keep it low to allow for evaporation, which is alot considering I have about 5 gals of water in my ten gallon. and trust me, there is enough bacteria in there between the sand and the rock for good filtration. also, I forgot to calculate the piece of caribean LR my friend gave me for my BDay so it adds up to about 9-10 pounds. (BTW you can acclimate mollies to SW)

Dan
 
OK,some pics of my tank.

DCFN0071.jpg

DCFN0070.jpg


You can see where the first 2 hang out, and the small female live behind that rocknear under the powerhead at night.
 
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