[willertac]

I'm looking for ideas for the 20 high in my school's environmental club, as I'm in charge of it. I have been suggested some WCMMs and shrimp, but I would like to add more variety.

Would a small school of hatchet fish work with them? And some Corys? And some Ghost shrimp?
I went on Aqadvisor, and added the minimum for each fish to the tank. It said the temp. range was 73-77.

But this isn't just about those fish, I would like your opinions! If there is another kind of fish that can live in colder water conditions with them, or a different fish altogether, I just would like to know how to add variety to a tank viewed daily by at least 100 people.

Curiosity questions: would a Fancy Goldfish be able to live with them, or would they be eaten eventually? If I bought them a baby Goldfish, would they be able to swim together while the WCMMs grow up?

We had Skirt Tetras (glofish) and ADFs last year and they had Cichlids the year before that. I would be taking care of the tank every week (and will probably be given a pass if there's an emergency) I think they use this to filter it:
National Geographicâ„¢ IFS30 Aquarium Filter | Filters | PetSmart
They should be less shy fish as there are many people that would be around them daily.

I think the Minnows are cool, but anything goes!

 

[kaysparf]

Any tropical community fish will work with them as the minnows are peaceful fish. You could try some swordtails and platy's, the male swordtails are pretty cool since they have a "sword" at the end of their tail but rule of thumb with those is two females for every male since the males tend to harass females when they are one on one. All the fish you said would work just fine with them, I have 5 cory cats in my tank and they are great for adding interest to the bottom of the tank since my other fish stay at the top, including my male sword and two female platy's.

 

[tankman12]

Danios are a good option. Since both are cooler water fish (69-73). Ghost shrimps are good. Also rosy red minnows (when happy can have great colors) are a good choice.
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[Misomie]

Why not mix your minnow school with colors morphs and the long finned variety? A popular and fairly common morph is called the Gold Karat.

I'd avoid goldfish. It's a fairly small tank for them and they just get filthy.

If you go for Zebra Danios as well, you can mix the blue, golden, leopard, and glofish variety together as they are all the same species and will happily school together.

Guppies and Endlers are other options.

The Hatchets might be spooked by the minnows so I'd be careful with adding them.

For inverts, try snails and maybe even a dwarf crayfish.