fan worms are good if you have a larger fish load. in things like seahorse tanks they most likely starve. I have only had 1 non-photosynthetic clam in one of my tanks and it was a mussel. never noticed anything specific with it in the tank. As for photosynthetic clams, they are awesome nitrate scrubbers but also need a ton of calcium.
Petco. probably the only place to get a clam for about $50. Depending on your light you will want either a derasa or squamosa as these are lower light requirement clams.
other than a par meter is there any way to gauge how good a light is? (bought a tank with a rapid led retrofit and they had no idea on its specs)
I have the calcium reactor going on the tank so keeping calcium levels up a clam are not a issue
other than a par meter is there any way to gauge how good a light is? (bought a tank with a rapid led retrofit and they had no idea on its specs)
I have the calcium reactor going on the tank so keeping calcium levels up a clam are not a issue