Universal Quartz Sleeve for 25 watt Savio/ Aqua UV/ Emperor Aquatics control algae these black grates can support

these black grates can support up to 150 pounds for the 12" x 24" model

and for good reason

Two or more Eco-Blox can be locked together to fill part or all of a basin

The increased oxygen levels throughout the entire pond will make your fish healthier and more active because they will not be confined to just the pond surface where there is typically more dissolved oxygen

It is also safe to use with both pets and livestock

Universal Quartz Sleeve for 25 watt Savio/ Aqua UV/ Emperor Aquatics control algae these black grates can supportA replacement quartz sleeve for the following: 25 watt Savio, Aqua UV or Emperor Aquatics. Length: 19 1 8" or 485. 80 millimeters.