Store › 100-Watt Drop-In Glass Heater with Built-In Controller Image 1 of 1 100-Watt Drop-In Glass Heater with Built-In Controller $59.99 The 100-Watt Drop-In Heater is used in 20-liter Brine Shrimp Hatchers and eRacks.Product Number: MH100GC Plug options: MHW100G-230 MHW100G-120 Add To Cart Added! The 100-Watt Drop-In Heater is used in 20-liter Brine Shrimp Hatchers and eRacks.Product Number: MH100GC