2" Bottom Drain Kit (BD1 drain) incl 2" Bulkhead, Valve, Fittings Ultima II Biotube Filters so a 100 watt transformer

so a 100 watt transformer would be a good

Advantages of Bio Balls over Lava Rock Bio Balls are inert

Unlike many available at department stores

phosphates and sludge from your pond while clearing the water and seeding your biological filtration

A bottom drain and an air diffuser built into one unit

2" Bottom Drain Kit (BD1 drain) incl 2" Bulkhead, Valve, Fittings Ultima II Biotube Filters so a 100 watt transformerThis terrific system lets you have both the benefits of a skimmer and bottom drain! The bottom drain is installed with flexible PVC pipe carrying the water under the liner, through a bulkhead and into the skimmer where a valve controls what percentage of the water goes through the skimmer faceplate (surface water) versus through the bottom drain. Kit includes #BD1 Bottom Drain, 2" Bulkhead fitting, 2" valve and other fittings. Kit does not include 2"