The Active Aqua Port Hole Cover fits all sizes of reservoir covers that we offer. It helps minimize evaporation and contamination of the nutrient solution in the reservoir, and also provides quick access to the reservoir for routine maintenance, such as checking pH and adding nutrients.
Slightly convex & ribbed design for strength and drainage of any water that may collect on top
Fits inside the reservoir top to guarantee that any water on it falls back into the reservoirs
Multi drill access points to install various meters and pump cords