EasyPro: Tranquil Decor: Natural Top Basalt Three Pack Column Kit | 20' 27' 35' with 48' Basin, 1000GPH Pump and Light Rings portable stand As a general rule

As a general rule

Minimum water depth is 12"

3/16 inch -- For larger fish

Minimum Operating Depth: Vertical Orientation 1HP - 32in

Reservoir can be made smaller because of the increased water percentage due to less rock being used

EasyPro: Tranquil Decor: Natural Top Basalt Three Pack Column Kit | 20' 27' 35' with 48' Basin, 1000GPH Pump and Light Rings portable stand As a general ruleComplete kit for easy, professional results! Tranquil Dcor Real Basalt columns have unmatched simple beauty. Perfect for creating a bubbling feature in a landscape or indoors, these columns will provide years of enjoyment. Each column is core drilled with 1 1 4 (32mm) hole from end to end, the last 1 1 2 is enlarged to 1 3 8 (37mm) to house optional light ring. Basalt columns are also available individually. Natural top columns make for a beautiful