Planning a Large Pond: Frog Breeding, Skippy Filters, and Volume Calculation

Pond owner upgrading from 120 to ~3000 gallons asks about frog breeding timing, Skippy filter effectiveness, and pond volume.

Frog Breeding

Green frogs and bullfrogs breed through summer; a May completion can yield eggs the same year. Provide shallow, plant-rich areas for amphibians. Deep, steep-sided ponds deter them.

Skippy Filters

Many DIYers report success with Skippy filters (large tubs with media). Regular cleaning is still necessary—don't neglect maintenance.

Volume Calculation

A 15' x 11' x 3' box = 3,712 gallons. With slopes and shelves, expect ~3,000 gallons. Larger is usually better, but include shallow zones for wildlife.