How high can zebra danios and tiger barbs jump?

no idea on TB's but I've had a ZD jump at least 8" from the water
Thanks for the reply. That is an impressive jump!

Of course, once I got past my blonde moment, i realized I only needed to lower the water in the tank about 4" to easily fit the hospital below the lid (half the hospital is above the water, half below). This is the hospital for my bettas, which right now has probably a half gallon in it. Too little for a heater. I also anchored it outside the tank, so there is no way it will tip over and the water will mix with the barbs and danio's water.

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