Algae within a pond? I have a small pond (that is created from water run-off, perverted...
I have a small pond (that is created from water run-off, perverted springs) and it is dirty! How do I get rid of pond scum?
Answers: Algae requirement nutrients and light in instruct to grow, so reducing these will help control its growth.
As it's formed from run-off, consider filling it via an alternative method, and blocking the run-off, as I assume the run-off is bringing nutrients within.
If you can reduce sunlight levels, next to some form of shading, this will help too. My pond's algae is reduced, as soon as the Water Lily leaves grow, and smother the surface. This is a beautiful passageway to create shade into the water. Otherwise, consider what could be positioned to increase shade levels. I've also get a floating hippo too, so if there are any objects that you could put onto the surface, this will help - floating solar fountains etc. Aim to cover 60-70% of the surface near plants - which will also absorb nutrients from the water, competing near Algae.
Otherwise, various forms of Algae can be treated with additives. There is one call blanket weed, which is Spirogyra, a very thin filament algae. Extract of Barley Straw will work near controlling this - it's feasible to add a small amount of submerged straw, but I find the gooey extracts to be easier and effective.
There are also additives for general Algae too, containing unprocessed enzymes etc, and these are effective. You'll find products like these at adjectives centers, or online. http://www.naturalenviro.com/productinfo...
To stop nutrient build up, other than from run-off, remove decaying plant debris, as this will rot down into nutrients that the Algae will thrive on.
A pond filter would remove some of the suspended situation, and would control some nutrient level, though much will just be dissolved and microscopic. You can also treat your hose down with UV light, connected via a pump/filter.
Hope this help. Good luck! Rob