30 Seconds Outdoor Cleaner Moss & Algae Stain Remover vs Lilly Miller Moss Out for Lawns Concentrate (1 gal) – Pack of 2

Overall winner: Lilly Miller Moss Out for Lawns Concentrate (1 gal) – Pack of 2

Key Differences

Lilly Miller (A) is a concentrated ferric-sulfate treatment sold in a multi-gallon pack and is noted for killing moss quickly and preventing regrowth but can blacken moss and stain light surfaces. 30 SECONDS (B) is a hose-end outdoor cleaner designed for moss and algae stains across siding and hard surfaces, is safe for lawns when used as directed, but has mixed results on older stains and some spray-handle leakage reports

30 Seconds Outdoor Cleaner Moss & Algae Stain Remover

30 Seconds Outdoor Cleaner Moss & Algae Stain Remover

30 SECONDS • ★ 3.8/5 • Mid-Range

Cleans stains caused by algae, mold, mildew, and moss using a garden hose. Designed to be safe for lawns and plants when used as directed, and easy to use without pressure washing. Customers note effective stain removal, especially on vinyl siding, with surfaces washing clean after application

Pros

  • Safe for lawns and plants when used as directed
  • Easy, hose-end application without pressure washer
  • Effective on vinyl siding and outdoor surfaces
  • Leaves surfaces looking clean and new

Cons

  • Potential leakage at spray handle connections
  • Mixed results on stain removal for older stains
  • Possible bleaching if sprayed on clothes
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Lilly Miller Moss Out for Lawns Concentrate (1 gal) – Pack of 2

Lilly Miller Moss Out for Lawns Concentrate (1 gal) – Pack of 2

Lilly Miller • ★ 3.8/5 • Budget

Concentrated moss control for lawns that kills moss and helps prevent new growth. Fast-acting liquid concentrate; covers up to 2000 square feet per pack. Customer note: effective but may stain light-colored clothing and concrete

Pros

  • Kills moss quickly
  • Prevents new moss growth
  • Easy-to-apply liquid concentrate
  • Covers large area per pack

Cons

  • Moss turns black after treatment
  • Potential staining on light-colored surfaces
  • Mixed reports on long-term moss return
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Head-to-Head

CriteriaWinner
Price Lilly Miller
Durability Lilly Miller
Versatility 30 SECONDS
User Reviews Lilly Miller