Originally Posted by
mx Mr Bean
to tell u the truth metal halides are the only way to go with clams. ive got a crocea under my 48" T-5 Nova Extreme but its starting to die after hanging on for about half a year now. The problem with insufficient light is that the clam will open up as large as it can. I thought that meant it was doing well but i spoke to a fellow aquarist (19 years)/marine biologist who explained that the clam was desperately trying to get light by fully extending. he also said the clam will last for months but eventually die. if u really want a clam u could try putting it up closer to the light but clams are most comfortable in the substrate and a clam in the sand is a happy clam. lol. my last line of defense is to culture my own phyoplankton and try to target feed him for a few weeks. hopefully hell come back.(might be false hope)
I have always kept my crocea's in the rockwork, they are one clam who prefer it to sand, at least thats what i have read.
I agree with you that MH works better for crocea since its a more hight light clam. In fact, i have 2, the one under MH seems happier then the one i have under T5 nova extreme, but if i had reflectors on them i believe it would be better.