Recently ordered several 20lbs bags of Eco-Complete African Cichlid
Substrate (the sand variety) ...I'll be setting up a 125-gallon tank in the
near future for Yellow Lab, Acei and Socolofi.

Well, they seemingly sent me CaribSea's Indo-Pacific black Arag-Alive
aragonite reef sand ("with natural and selected marine bacteria") by mistake
(not sure if it was an intentional substitute as it's sold at practically
twice the price of the Eco-complete in their catalog).

This is my first time using sand as a substrate. Any idea if this partiular
marine sand (apparently intended for marine and reef aquariums and packed in
water) will be compatible with Malawi lake cichlids (specifically for the
aforementioned species)?

kaybee