Small Pond Green & Dirty: Barley, Plants, UV & Shade

Small pond, 3 goldfish, pump/filter included — always green. Standard filter = mechanical only. Fix the biology.

Why Included Filter Fails

• Sponge + carbon = mechanical/chemical. No bio-media, no UV.
• 3 fish = bioload. No bacteria home = ammonia → algae food.

Four-Part Fix

1. Barley straw: Bale or extract — natural algae suppressant (2–4 wks to work).
2. Plants: Lilies, marginals, submerged — 60% cover. Eat nutrients algae needs.
3. UV clarifier: Add inline — kills green water algae.
4. Shade: 6+ hrs sun = algae engine. Shade sail, trees, or blue dye.

Reference

Koipondmagazine.com algae control article — comprehensive, free.

Small pond + included filter = green. Add biology, plants, UV, shade. It's a system, not a gadget.