After weeks of testing the Stock Tank Clarifier tablets in my horse troughs, I can confidently say these little blue tablets are a mixed bag. The promise of cleaner water with less scrubbing? Absolutely delivered—but with some caveats.

The Good: These tablets WORK on algae and sludge. My 150-gallon metal trough went from green soup to noticeably clearer water within 3 days. The 'sawdust effect' mentioned in other reviews is real—floating hay particles clump and sink instead of fueling algae blooms. For my sun-baked Texas troughs, this means stretching cleaning intervals from weekly to every 2-3 weeks.

Pro Tip: Start with a clean tank (pressure wash if possible) and use slightly more tablets than recommended for heavily soiled troughs. I used 1.5 tablets per 250 gallons during peak summer heat.

The Not-So-Good: Don't expect miracles on built-up gunk—those stubborn bottom layers still need manual removal. Also noticed slower results in rubber troughs versus metal ones, possibly due to material porosity.

Unexpected Bonus: My picky drinkers (looking at you, Arabian mare) seem to prefer the clarified water—fewer 'water strikes' where they'd refuse to drink until I refreshed the whole tank.

Final Verdict: At $0.25/tablet, these won't eliminate scrubbing but significantly reduce the chore. Worth it for sun-exposed troughs or messy eaters. Just manage expectations—it's a maintainer, not a magician.