Like tea leaves, most leaves that fall into your pond contain tannins, which are released into the water during the decomposition process, causing teacolored water. Certain leaves contain more tannins than others, but the result is the same – brown stained water. Tannins can also be caused by run-off flowing through planting beds that are covered in wood mulch. Tannins do not settle out like sediments so they need to be physically (or chemically) removed.

Start by removing the source of the tannins by netting any leaves that have settled on the bottom of the pond, and by regularly emptying your skimmer net. The most effective way to remove tannins is by using Aquascape Activated Pond Carbon.  Simply place the Activated Pond Carbon where there is constant water flow, such as a skimmer, biological filter, or stream. The carbon acts like a magnet and actually absorbs the tannins from the water. Activated carbon should be changed on a regular basis according to the manufacturer’s recommendations. 

Activated Carbon Pellets can be placed in a mesh bag or a nylon stocking works as well.

• Clarifies pond water 
• Quickly reduces pond odor 
• Removes discolorations
• Treats up to 800 gallons

 

Aquascape Activated Pond Carbon is also highly effective at removing dissolved organics from the pond water, such as stains and discoloration caused by leaves and organic debris. Using Aquascape Activated Pond Carbon is also an effective method for controlling odor and removing harmful chlorine and chloramines caused by tap water.