New 45G - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 06-23-2010, 01:53 PM Thread Starter
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Salix's Avatar
New 45G

I'm getting a new 45 gallon tank today and while it's cycling I wanted to get some ideas on what to stock it with. I know I want a community tank of smaller fish like mollies and platies (it seems like almost all of the larger fish are more aggressive and carnivorous and I don't really have the money to take care of something like that).

But what else can go in a tank with mollies and platies? I've asked around at the different pet stores in my town and gotten some contradictory advice. Any help on this subject would be much appreciated. Thank you so much for your time.
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post #2 of 3 Old 06-23-2010, 03:17 PM
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Zebra danios, cardinal tetras,neon tetras, cherry barbs, white cloud mountain minnows.....take a look at what are peaceful fish where you buy them. The list is long. It mostly depends on what's compatible and what you like. I also like clown plecos because they do not get as big as the other kinds. I haven't had much luck with mollies since they seem to like a little salt in their water. If you put swordtails with the platies they WILL breed with each other.
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post #3 of 3 Old 06-23-2010, 03:28 PM
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Recognize that livebearers require basic (alkaline) and harder water, so suitable tankmates should be fish that either prefer the same or at least can tolerate it. Not all soft water fish can, like the cardinal tetra mentioned, which should not be kept in basic hard water. Check out the fish profile for details as to why this is [click on the shade name to see the profile].

Mollies can tolerate some salt but it is not necessary and if anything is going in with them I would not use salt. Some fish are very sensitive to salt at even low levels.

You'll find lots of options if you read through some of the fish profiles.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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