Did you add a water conditioner after you refilled the pond? Some of these leave a residue.

By cleaning, I hope you only meant that you drained it to remove debris from the pond, and that you didn’t use any cleaning products (no soap should be used). When the water level was lowered, you might have disturbed a pocket of decaying leaves from…[Read more]

Yes. I wouldn’t necessarily use the crushed coral, as the pieces are fairly large and it will collect “dirt” in between the pieces. I like something smaller, and the company that puts out a lot of the substrate for marine tanks has many more types available: http://www.caribsea.com/pages/products/dry_aragonite.html Most of what I use is in the…[Read more]