Attempt to rinse Flourite sand
Anybody who has ever used Flourite knows darn well that if you don't rinse it *thoroughly*, you get coffee. Or really dark tea if you're lucky.
Normally I'd just make myself a drink and rinse a couple cups at a time in a small wire mesh colander. 30-45 mins per 15lb bag. Time consuming, but it works.
Sand is different. In retrospect, pantyhose might have worked - possibly. But the grains are far too small for any colander. So I ended up dumping it into 5g buckets, half a bag at a time. Add some water, swish, stir, dump excess water. Once the easily-removed stuff is gone, fill the bucket, stir it up well, and let it sit for 5-10 minutes. Use a spare canister hose and siphon all water into the sink (buckets were sitting on the kitchen counter). I figured anything still floating after 10 minutes would get sucked out.
Well, I used this process for a new 10g tank. An hour after filling, I can actually see my hand through the tank. Set up a filter and I'll check on it in the morning, but it's promising so far.
Just wanted to share!