Is it worth keeping rainbowfish in a tank that is lidless?

FinalFins

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I have a 20 gallon tall tank that I think rainbowfish, specifically pseudomugils (furcata or gertrudae?) and I was wondering how much they jump. I currently have fish that really spend more time at the bottom and hiding so they arent really jumpers. I keep the water level pretty high and being top dwellers I was wondering if it is worth keeping rainbowfish in a lidless tank, if they would suicide themselves every time, and be a worthless investment.

If you could also provide experiences and opinions on Boraras spp. as well, jumping in a lidless tank.
 

A201

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Might be a good idea to invest in inexpensive black plastic mesh, cut to size & drape it over the top of the tank.
 

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