fiddler crab?s 1 molted how many tsp of salt do the need?

Question

i read a whole lot about them before i got them. the pet store said add 1 tsp aquarium salt per 10 gal of water. i guess i have about 9 galons of water because i made a way for them to get out of the water they love to hang out there. i told the pet store owner they need air a month ago he still hasnt made a way for them to get any. anyway i have a 10 gal. tank 3 fiddler crabs ,3 guppies one of which looked pregnate the next morning after i got it their where 6 babies i thought it took longer for them to lay eggs and hatch.ive only had the guppies and crabs 4 days one crab molted do i do anything for it. there been a lot of actity in 4 days im amazed. i just want them to do well. how much salt should i add. im geting some java fern and hornwort in 2 days. how do you add iodine and calcium. if you can answer 1or 2 of ? id appecate it.

Answer 1

Salt should be closer to 1 teaspoon per gallon. marine salt is preferred to aquarium salt because it has more of the minerals the crabs need to harden their exoskeletons and it raises the pH a little for them. The sea salt will have the iodine and calcium in it, so you'll be adding this every time you do a water change.

Leave the molt in the tank - the crabs may actually eat it as a way of recycling the minerals used to make it. Only take it out if they haven't eaten it after a few days.

Guppies are livebearing fish, and the females are often pregnant when you buy them. They can give birth about every 28 days.