The acrylic stand fixes to the inside of the biOrb to provide a flat surface onto which a 50 watt heater can be fixed. Although designed for use in the biOrb, the heater stand can be used in most aquariums if desired.
A snap out section in the biOrb light unit provides a gap into which the lead from the heater can rest, keeping the lead tidy whilst allowing the light unit to remain snugly fitted in the top.