Join Date: Oct 2012
Location: North Central, OH
Cories like to borrow, so sand is preferred to keep them on.
They can do fine on gravel too, as long as there isn't any rough edges on them because cories can cut themselves very easily.
I keep my cories on gravel too without any issues, but I know they would be much happier on sand
10 HM, 3 HMPK, 5 HMPK fry
8 German Blue Ram, 5 Green Dragon BNP, 4 Albino BNP, 4 Calico BNP, 6 Red BNP, 5 Kuhli Loaches, 2 ADF, 7 Peppered Cories, & 6 Tiger Endlers + Fry
12 full time tanks, 4 NPT, 6 QT/Breeders