ejmeier
Active member
Hi guys.
I got a 5" Derasa Clam a couple of months ago, and it has been in good apperance/health from day one; mantle extension has always been good. It came to me with a white rim on the end of the shell - showing recent growth.
Yet shortly after adding this clam to my reef, the white rim quickly got covered with coralline algae and stopped growing. There is now no sign of growth in this clam.
The clam is under a 20k 400w MH bulb. He is placed on the bottom of the tank on a CC substrate approximately 21" from the top of the tank.
My Ca is typically between 370-425, with an average value of around 415. Alkalinity is usually between 8 - 12, with about 10.5 being average. PH is around 8.1 - 8.3. Temperature is in the range of 80 - 83 F. SG is kept at 1.025.
I have checked this clam at night and have not found parasitic snails on his mantle, and I have even taken him out of the tank in the middle of the night for a few minutes to inspect the underside of his shell, and have never found any sort of parasites.
The only thing that I will mention is that I do have a neon goby that will sometimes swim into this clam's mantle and irritate it. This is only on an occasional basis, and does not appear to have any lasting impact on the clam.
This is the only clam currently in my tank.
Does anyone have any idea why this clam isn't growing?
I got a 5" Derasa Clam a couple of months ago, and it has been in good apperance/health from day one; mantle extension has always been good. It came to me with a white rim on the end of the shell - showing recent growth.
Yet shortly after adding this clam to my reef, the white rim quickly got covered with coralline algae and stopped growing. There is now no sign of growth in this clam.
The clam is under a 20k 400w MH bulb. He is placed on the bottom of the tank on a CC substrate approximately 21" from the top of the tank.
My Ca is typically between 370-425, with an average value of around 415. Alkalinity is usually between 8 - 12, with about 10.5 being average. PH is around 8.1 - 8.3. Temperature is in the range of 80 - 83 F. SG is kept at 1.025.
I have checked this clam at night and have not found parasitic snails on his mantle, and I have even taken him out of the tank in the middle of the night for a few minutes to inspect the underside of his shell, and have never found any sort of parasites.
The only thing that I will mention is that I do have a neon goby that will sometimes swim into this clam's mantle and irritate it. This is only on an occasional basis, and does not appear to have any lasting impact on the clam.
This is the only clam currently in my tank.
Does anyone have any idea why this clam isn't growing?