Yes, depending on the species, they CAN and WILL get big. Gigas (appropriately named) is one of those bad boys who will. Derasa will too. Smaller bivalves like maxima and crocea stay within the bounds of an average reef tank.
I love clams. I just finished a DIY acrylic tank that I'm setting up as a "clam only" system for my family room. I can't wait to set it up!!
Dave
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><((((º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><((((º>
·´¯`·.¸. , . .·´¯`·.. >((((º>
"Fins to the left...Fins to the Right, I'm going home to play with my reef tonight..."
If you're looking for me, and I'm MIA from the board, email me at JustDavidP (at) gmail (dot) com.
Experience in aquaria, 35 years. Experience in marine, 20+ years. Experience in Reef Keeping, 6 years. Always a newbie! | 
