..we have 4 crabs and might die they are molting and have no heater at all and have 2 small crabs in a little cage and 2 big ones in a big cage both under a normal tall table lamp. we are trying to buy a 10 gal. tank on free cycle.we feed them a nice diet of fruits(food from store is bad for them)we only need decloried water(something like that)and a heater(we have sand)..we bathe them every week(once).what can we do to keep the crabs:norman, smug, mango and leo-bio alive??(dont ask about names plz)please help fix our problem and find a good soulution