Clam looks bleached

[SNAKEMANVET]

I have had these two squasomma clams for three years now.One has started to bleach and the other has great color,my question is what could be causing this.The tank is a 75 gallon,I do 25 gallon water change every two weeks.The lighting is two 250 mhs,and flow is moderate.They are side by side in the tank.Any input will be appreciated. thanks

 

[SNAKEMANVET]

Well the clam didn't make it.I have no clue why one would bleach and die and the other looks great.

 

[blueclam99]

If the entire mantle was bleached, it is called generalized bleach which is caused by lack of nitrogen in the system. I guess the healthier one must fight and consume all of nutrient in the tank. I know when a clam get iarger, you have to increase fish waste with monitoring nitrate & po3 level. I keep xl trigger and angels in the huge refuguim for clam tank. The other cause for bleaching could be heavy metal poisoning. But for your case, hmp may not be a issue since the one is doing well. Good luck!

 

[SNAKEMANVET]

Thanks for the help, I have 2 yellow a sailfin, blue throat trigger, Niger trigger pair of clown fish, a pair of manderins bi color angel and coral beauty in a 75 gallon tank.I will be moving them to a 180 next week.other clan looks great.