• Welcome to TONMO, a community of cephalopod experts, hobbyists and enthusiasts. Established in 2000, we are the founders of TONMOCON, and birthplace of World Octopus Day and Cephalopod Awareness Days. ...You can register here, and Introduce Yourself. To rid yourself of ads and enjoy other perks, become a Supporter for just $25/year. (Now accepting bitcoin & other crypto!) ...Follow us on Twitter and YouTube for more cephy goodness.
  • Looking to buy a cephalopod? Check out Tomh's Cephs Forum, and this post in particular shares important info about our policies as it relates to responsible ceph-keeping.

Acclimating my mollies


Jul 11, 2003
i just bought six new mollies. 2 are black, 2 are dalmation, and 2 are gold.
I have been acclimating them in a bowl for 2 hours adding 1/4 cup (1/8 liter) every ten minuets. I just emasured the salinity of the water the fish are in and it is very low should i add them anyways??

Thanks in advanced.

p.s- when i went to my LFS and asked for 6 mollies and the guy was like "i thought u had a saltwater tank" and i told him "i do but i plan to make them marine" and the guy gave me a really weird look like i was crazy :bugout:


Aug 6, 2003
I just put four black mollies in my tank... was orginally 5. The first four acclimated using a bucket, an aerator, and a airline tube. I sat there manually squeezing the tube to slowly put saltwater from my tank into the freshwater they came with, and occasionally taking out a cup or two, over the course of about 4 hours. this may have been too fast, ive read it should take a day (or more!) and one of them died within the first day in my main tank. i replaced it with a new one that i acclimated in a similar way... i used a 5 gallon bucket of fresh mixed saltwater instead of my tankwater and this time i made a one drip-at-a-time siphon out of air tube with a bit of sponge stuck in it. i let this go overnight, about 14 hours total I think. I actually just put him in the tank before I went to work this morning so hopefully he'll be alive and makin' little mollies when I get home.
I don't know the rules, but I wouldn't put a fish in water that had a significantly different salinity than what it was in... aside from "dipping."
I hope this comes in time to help with your mollies!
ps- i got all kinds of looks from the girl at petsmart for putting them in saltwater, especially when i wanted to trade in one of the females they sold me for a male...


TONMO Supporter
Nov 14, 2002
It's quite well known that mollies can quite quickly adapt from fresh to saltwater and viceversa... I have two mollies in my FW tank that have been in SW twice... I actually think they always look healthier in SW