Oase HeatUp 100 Watt (up to 30G) Aquarium Glue They have more capacity than

They have more capacity than most biological media

Does not raise phosphate levels

removable base and power cables

I am afraid of heavy metals building up in my tank

Brilliant Colors & Rapid Growth

Oase HeatUp 100 Watt (up to 30G) Aquarium Glue They have more capacity thanDescription Accurate temperature adjustments Temperature scale can be adjusted between 66F 90F. A secondary control knob allows for precise readjustment of the temperature within + 2F Uniform temperature levels Temperature levels are monitored and controlled by bi metal technology for automated heating, includes a thermal shutoff switch for added protection Durable High quality, double insulated quartz glass, created to withstand greater temperature