Hello Everyone! As you may recall, not too long ago I had a straw submerge in the deep salt water basin for as long as 40 minutes. I just witnessed one of my tiny E's in the salt water basin for 20 minutes while I sat next to the tank and watched the clock. He was completely submerged-shell and all-exactly like my straw had done previously. Once again, I have no idea how long he was under before I spotted him. One interesting thing I want to point out is that both times this has occured, I had made the water saltier than it had been previously. Normally, my sw has a specific gravity of about 1.023. Both times that the crabs have submerged it has been around 1.0285. The first time I made the water saltier (when the straw submerged) was basically because I had sprinkled in some DW crystals (which I supply daily in the food dish) into the basin itself after the water had already been prepared. I, for some unexplained reason, thought the water was not salty enough-call it a hunch, I don't really know. Even though, I do test each batch with a hydrometer and the SG is always within .001 of the batch before. Something made me sprinkle that extra sw mix into the water. There was a water change in between when the straw submerged and since the E has submerged. Both batches of water were Cyrstal Sea Marinemix Bioassy Formula--the first with an additional DW added and the second (the batch that is in there now) was prepared with 10 TBSP of salt mix. It could all just be pure coincidence. Perhaps they liked the new salt mix or perhaps they liked more salt in the water. Either way, I found it interesting and wanted to share.