Derasa anchored on rock??

[tyh]

Anyone anchors their derasa on the rock, instead of leaving it on the subtrate?
I'm thinking of letting anchor on a flat rock then burying it in the substrate... It's a week old, left on the substrate, but rather unstable, often tilts to the left or right. Tried putting rocks on either side but didn't work.
PLease advise

 

[Len]

There's no harm in trying, but Derasas don't anchor down very well unlike their cousins, T.maxima and T.crocea. Derasas get very big and heavy very fast, and their weight pretty much keeps them where they're suppose to be in nature.

 

[Anonymous]

My T. d. is attached to a large rock. The clam is about 8 inch across, but the attachment is smaller than a T. crocea 1 inch in size.... definitely not meant to help it stay in environment in which T. crocea lives in, with stronge current and wave.

Depends on the clam, some may never attach to rock, esp. if it is older (9-12 inch). But if it does, it certainly will help somewhat to get it to stay put. I would just put the rock on which the clam is attached to directly on the sand, instead of burying it.... just a personal preference.

 

[Mouse]

Dont clams actually imbedd themselfs by disolving the rocks, ive seen some on flat rock walls diving that were literally just mantles sticking out of the holes. Got me thinking that if it decided to weld itself to the side of the tank it might eat through the glass.

 

[taikonaut]

Both chemical (acid) and physical (rubbing) action is used by borrowing clams (T. crocea, e.g.) to bury into rock. Both of these are not efficient against glass, besides, T. deresa is one of the weakest borrowers.