Q. What does filter media do for my water garden? – Debbie in Illinois
Keep It Clean
With all of the pads, balls and nets in this blog you might think The Pond Guy has hung up his waders and opened a sporting goods store. Not to worry pond guys and gals, we are of course talking about filter media in your water garden.
Hey! Nice Pad!
When you look inside your filter, whether it’s a waterfall filter or pressurized filter, you may notice there are assortments of pads, balls, etc. These are called filter media. This filter media serves a vital purpose in any water garden.
Filter media are specifically designed to help colonize a ton of natural bacteria in a small area. As fish excrete waste, ammonia levels began to rise. Without enough natural bacteria, ammonia levels can become so high your fish will become stressed which can eventually to death. Natural bacteria will grow in a water garden without filter media, but unfortunately it is very minimal and never enough to keep up with high ammonia levels.
Less IS More
Many pond owners often think that a clean filter pad will lead to a cleaner pond. This is not the case. As it takes several weeks for nitrifying bacteria to colonize, many pond owners often clean their filter media as soon as it gets dirty. This unfortunately defeats the purpose of the biological functions of the filter media. Some of our readers have written in telling us that this buildup is even blocking or restricting water flow. It is most likely debris or algae being picked up from the water, not the bacteria causing this issue. If necessary, to clean filter media we highly suggest removing the filter media from the filter and placing into a bucket of “pond water” and gently swish the media back and forth. Do not scrub, or use tap water to clean the filter pads. Again, this will cause a loss in natural bacteria. If you accidentally do clean your filter pads, you can use PL Gel on your filter pads to colonize the bacteria faster. It is known throughout the pond industry to reduce colonization by up to 80%!
To prevent blockages to your biological filters use a pump pre filter or a skimmer which includes a net or debris basket along with its own filter pad. This will prevent large debris from getting to your filter. Vacuuming will pick up debris and muck from the pond floor also preventing clogs. Placing these “pre-filters” as buffers will ensure a shorter, easier cleaning time as well as make certain that your beneficial bacteria are left alone to flourish and protect your water garden.
POND TALK: How have you tackled filtration in your water garden? How often do you find yourself cleaning your filters?