Just get like 10 mollies, 2 guppies and 1 african dwarf frog to see how much space it takes up then keep adding up to 15 mollies, 3 guppies and 2 african dwarf frogs. Or you could ask the person there if it would be enough room.
way over stocked.... if they are the more common sailfin molly or even the dalmation molly they get really big....most will get about 5in some have been know to get over 6in.....so your tank will not support that may fish...thats over 70in of fish in just the mollies with out the guppies added in...just keep at most 5 or 6 mollies
