Gear Score Methodology
PetPal Gear Score
Koi Pond Summer Care: Fixing Algae and Low Oxygen (2026)
Editorial synthesis of water-quality guidance — pond-keeping and water-garden consensus, published dissolved-oxygen and water-quality standards, and koi-health consensus. Manufacturer documentation from CrystalClear, coospider, Alloxity, Aquascape, and Danner was reviewed. Community consensus from r/koi and r/ponds was included as consensus, not quotation. No first-hand product testing — PetPalHQ does not run a testing lab.
PetPal Pond-Care Score = (Expert Consensus × 0.35) + (Summer-Fix Fit × 0.25) + (Fish Safety / Welfare × 0.20) + (Value × 0.20)Factor breakdown
Expert Consensus
35%Synthesized from pond-keeping and water-garden consensus, published dissolved-oxygen and water-quality standards, koi-health consensus, and manufacturer documentation. The PetPal Pond-Care Score is a composite of expert opinion — PetPalHQ does not run a testing lab.
Summer-Fix Fit
25%How directly the item addresses a specific summer failure mode — an oxygen crash, a green-water bloom, incoming nutrient load, biological imbalance, or not knowing when to act — rather than how it performs as a standalone product ranked against rivals.
Fish Safety / Welfare
20%Alignment with koi-health principles — keeping dissolved oxygen high, avoiding the algaecide-first mistake that crashes oxygen, controlling nutrients, and matching feeding to water temperature so warm water does not spike ammonia.
Value
20%Cost relative to the item's role in the summer protocol, including running cost, durability outdoors, and how much of the safe-and-clear outcome the item is responsible for.
See all score methodologies on the Gear Score index.