I have a tank set up for maybe shrimp and wanted to know if they need a hood..
Yeah all fish and shrimp can be jumpers so you probaly need a hood
The shrimp generally shouldn't try to escape but its happened before where they jump... I wouldn't advise going hood-less...
if its for the planted tank I would got hood-less. other wise you will be cutting out a lot of the wave length to your plants.. JMHO
Personally, I would say yes, you should have a hood. there are other reasons except jumping to have one. It helps with evaporation, and keeps contaminants out of the tank.
I don't have a top on my shrimp tank but I keep the water level down.
Is there any way I can make a makeshift hood out of plastic wrap? I only ask this becase the tank s a 15 gallon bowfront it was meant to be used as a reptile aquarium and had a screen top but they never used it and I want to order a hood but it may take a while and thought since it is an HOB filter there would be enough air from the filter and enough room to put shrimp food into the Tank if I could do that...