ActiveAqua Covers are slightly convex and have a 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.

25 Gallon Reservoir Cover - 7in x 27in
50 Gallon Reservoir Cover - 36.5in x 36.5in
75 Gallon Reservoir Cover - 43.5in x 43.5in
100 Gallon Reservoir Cover - 50in x 50in
Port Hole Cover - Fits all sizes