EasyPro Buying Guide
The one decision that makes or breaks a pond build is matching the equipment to your water volume. Undersize the filter and the water stays cloudy. Oversize it and you overspend. This guide maps your pond to the right EasyPro system using real model ratings. We size these every day as an authorized EasyPro dealer, so if you want a second set of eyes before you buy, call us.
Everything else keys off this number. For a rectangular pond:
Length (ft) × Width (ft) × Average depth (ft) × 7.5 = gallons
Example: an 11 × 16 pond at 2 ft average depth is about 11 × 16 × 2 × 7.5 = 2,640 gallons. If your pond is irregular, measure the average length and width and use the same math. When in doubt, round up.
Turnover is how often your whole pond passes through the filter. It sets your pump size.
Pump output drops as the water climbs to your waterfall. If you have real head height, size the pump up a step.
Everything for a DIY build in one box. Pick by finished pond dimensions.
| Pond size | EasyPro kit | Model |
|---|---|---|
| 6' × 6' | Pro-Series Mini | ET66FB |
| 8' × 11' | Pro-Series Mini | ET811FB |
| 11' × 16' | Pro-Series Small | ES16AFB |
| 16' × 16' | Pro-Series Medium | EM1616FB |
| 16' × 21' | Pro-Series Medium | EM1621FB |
The all-in-one option. Each system pre-plumbs a pressurized bead filter, a self-priming external pump, and a UV clarifier, ready to connect.
| Pond up to | System |
|---|---|
| 1,800 gallons | SMF1800 |
| 3,600 gallons | SMF3600 |
| 6,000 gallons | SMF6000 |
| 10,000 gallons | SMF10000 |
Mechanical and biological filtration if you're pairing it with your own pump. Ratings assume a fish load; for heavy koi stocking, size up.
| Pond up to | Filter |
|---|---|
| 1,800 gallons | PBF1800BL |
| 3,600 gallons | PBF3600BL |
| 6,000 gallons | PBF6000BL |
| 10,000 gallons | PBF10000BL |
Gravity biofilters that double as the source of a waterfall or stream. Pick by the max pond size EasyPro rates each unit for.
| Pond up to | AquaFalls |
|---|---|
| 1,200 gallons | Mini (AT2) |
| 2,500 gallons | Small (AS2) |
| 6,000 gallons | Medium (AM2) |
| 15,000 gallons | Large (AL2) |
Match GPH to your pond volume for once-per-hour koi turnover. These are the free-flow ratings; expect less as waterfall height increases.
| Output | Good for (koi, ~1x/hr) | Pump |
|---|---|---|
| 3,100 GPH | ponds around 3,000 gallons | TH150 |
| 4,100 GPH | ponds around 4,000 gallons | TH250 |
| 5,100 GPH | ponds around 5,000 gallons | TH400 |
Aeration goes by surface area and depth, not gallons. Backyard ponds run a 1/4 HP kit. Larger ponds and small lakes, up to several acres, use 3/4 HP rocking-piston systems like the PA86W. If you're not sure how many diffusers your shape needs, that's a good one to call about.
For a 5,000 gallon koi pond, step up to the 6,000 gallon tier: an SMF6000 skid-mount system or a PBF6000BL bead filter. Koi are messy, so sizing the filter above your actual volume keeps the water clear. Pair it with a pump around 5,000 GPH for once-per-hour turnover.
For a rectangular pond, multiply length in feet by width in feet by average depth in feet, then multiply by 7.5. An 11 by 16 pond at 2 feet deep is about 2,640 gallons.
For a koi pond, aim for once-per-hour turnover, so about 3,000 GPH at your waterfall height. The EasyPro TH150 puts out 3,100 GPH at free flow and is a good match at low head. If your waterfall is tall, size up to the TH250.
Yes. Each SMF system comes with a pressurized bead filter, a self-priming external pump, and a UV clarifier, all pre-plumbed and ready to connect to your incoming and outgoing lines.
Go up, especially for koi or a heavy fish load. Extra filtration capacity costs a little more up front and saves you from cloudy water later. For a lightly stocked water garden, the smaller size is usually fine.
Still not sure what fits? Run your numbers through the calculator, or tell us your pond's size and fish load and we'll size it with you.
