Vermiculite ....used it for 20 years....it doesn't rot....it's a rock....use it for years....over the months it is unused the bacteria will eat up any fluids that leak during hatching....

perlite....doesn't hold water actually...another rock...I used it mixed with vermic...but alone...it will not hold water...it is used to hold eggs above the water....the water line is below the top of the perlite....it's also rough and has sharp edges...

Hatchrite....bet it costs more...it's made special....special price then...

go to a Greenhouse supply type store...find a 40 pound big bag of vermic....use it for the next decade....cheap enough...good stuff.....

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........JY

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