Subject: Re: Help!!
by DaveGodfrey on 18/3/2013 15:46:11
If you want to keep mollies you'll need to use the heater, and keep the tank at around 26 degrees. The gold barbs don't necessarily need to be kept that warm, and as long as your house is not too cold will be happy with a tank at "room temperature" with some seasonal fluctuations. Mollies won't cope at all well with that.
So if you let your water mature for 24 hours (so you don't get pH fluctuations when doing water changes) you'll have to heat the water before adding it to the tank, so you don't shock the fish with a sudden temperature change. If you just kept the barbs then that isn't necessary as the water in the tank is going to be about the same temperature as the water in the bucket.
(Personally unless you can find "wild type" mollies- which sadly you probably can't- I wouldn't keep them at all, but then I'm not a fan of most artifical varieties of fish- especially the "balloon" ones.)
In a 100L tank a shoal of 7-10 gold barbs would put you about fully stocked based on the 1cm/2L "rule", which is more of a guideline really. Understocking a tank is never a bad idea when you're just starting out. When the tank is nice and mature and you have a good growth of algae you could get a Bristlnose Plec would be a nice addition, an give some interest at the bottom of the tank. (I'd have a heater set to about 20-21 degrees C if you got one, to keep the edge off just in case you had a cold snap. You'll probably find it only switches on on the very coldest nights).
If you do keep a couple of mollies get either only males or virgin females, or you'll very quickly have hordes of babies. (Females can store sperm for up to 3 months, and drop dozens of babies in one go). They're not shoaling species like the barbs are, so you don't *need* 6+ to keep them happy.