After 4 months of using these filter socks in my 75-gallon reef tank, I can confidently say they're game-changers. The water clarity is noticeably better - my corals literally pop with color under the lights now.

What surprised me most was the durability. I bleach-wash mine weekly (following their instructions), and they still look brand new. The stitching hasn't frayed at all, unlike cheaper socks I've used that fell apart after a few washes.

Pro tip from experience: The 7" size fills up faster in high-bioload tanks (I change mine every 3 days), but that actually means they're working! I love watching them gradually turn from white to brown - visible proof they're trapping debris.

The only minor drawback? They're slightly stiff when new, but after the first wash, they soften up perfectly. For anyone debating between brands, these are worth every penny - my protein skimmer runs more efficiently since switching to these.