I'm willing to bet that the only brackish DBT's in the hobby are the few that are wild caught.....and there is no need to bother with those.
eh....I still feel they are evolved for brackish in nature for a reason. They are probably healthier kept in brackish water be it for one unknown reason or another - certain food source, reliable source of mineral salts, stronger immune system, whatever have you. To ME, they seem like they evolved from FW to Brackish, as opposed to something like the FRT you guys are familiar with, which certainly appears to have been a sea turtle at one point in evolution that worked their way inland as millenniums passed by. I have to stop nd think, "For what reason did a FW turtle have ....to leave FW for a mixture of both? ....
......and what's more? There are like 6 different ssp of DBTs from N. Atlantic, all the way to Mexico/CA......so why did ALL of them from such a massive range do the same thing OR Did the DBT all start out from one common ancestor and did they keep moving North/East from Mexico/CA slowly as they evolved to adapt better to the climate and environment OR.....
......were they already present on Pangaea or Gondwanaland or where ever, and did each population simply evolve to suit the climate and conditions when Gwondwanda/Pangaea started splitting apart and they slowly noticed the water salinity changing and the 2 supercontinents creating a further gap to swim every year. Picture the plate shifting directly under the DBT's homes all along the Atlantic and Gulf coasts, assuming in theory, right in the same shape western Africa makes a puzzle piece to fit into the Americas and N. Europe seem to fit like Dovetails in Nova Scotia - and as they separated, the DBTs kept traversing back and forth among the 2 continental plates - why not?? Shallow seas, no problem, but what we are seeing here as time progresses is what used to be a shallow stretch of water expanding over 5,000 miles and berthing some of the deepest trenches on Earth.
At some point in time, the ancestors of DBTs just said enough is enough , were not migrating or whatever it was they were doing and they choose a side - here obviously as the shallow sea began to form the treacherous, dark abyss we call the Atlantic today.
Screw - it, it's a theory, and it's just a theory, but it's MY theory
Regardless how it all happened, I still think all those ssp live in Brackish water for a good reason and taking it away from them for no other reason than ease of care, we might be missing something very important here mankind just hasn't discovered yet.
CA = Central America, not California
Frank Castle
here