How to apply barley straw by type of pond...

When should I place barley straw in my pond?
New Lavender Pond Pads have been developed as a result of further research by the Centre for Aquatic Plant Management. It was discovered that lavender could be more effective as a natural algaecide than barley straw but needed more oxygen to break down. Green Ways have combined the benefits of the two plant materials into their New Lavender Pads but recommend that the pads are only used where there is a pumped system to ensure sufficient quantities of oxygen in the water.
Pond Talk: Have you used barley straw extract in your pond? Were you satisfied with the results?
MICROBE-LIFT/Barley Straw Pellets + is an environmentally responsible, cost-efficient pond conditioner that is a natural and organic way to a healthy pond environment! Barley straw and selected natural peats have been processed and packaged to make them easy and clean to apply. Manufactured using an exclusive proprietary pelleting process that eliminates the use of wheat, corn and other binders, the barley straw is harvested and stored under climatic conditions that assure the quality of these essential ingredients. Pond Talk: Have you used barley straw extract in your pond? Were you satisfied with the results?What Are The Benefits Of Using Barley Straw In My Pond?Pond Talk: Have you used barley straw extract in your pond? Were you satisfied with the results?
A couple of studies have shown that barley straw does inhibit algae growth in water. If that's all the info you need in order to buy and add barley straw to your pond then your next step is: The most important point is that these studies show barley straw can inhibit the rate of algae growth. Most people seem to read inhibit as kill or stop. The studies only show growth slowing. As the scientists say; "it's algistatic (prevents new growth of algae) rather than algicidal (kills already existing algae)". The best case to expect, if you believe the studies, is your green pond will become greener, but not as green as it would have without the straw. That's not the same as "clear" to me. There are some unscientific cases cited of algae reduction, but unknown if the barley was the cause. No study, or even anecdotal evidence by any University field trial, has ever even suggested the possibility of algae being eliminated to the point of what a backyard pond keeper would call "clear".These are fine studies. The Newman study is often cited by barley straw sellers as proving barley straw will clear backyard ponds. The myth is in the marketing which promise, or imply, clear ponds. The reseach is true, but what sellers are saying, and buyers are believing, is a myth.I first heard barley straw use being attributed to farmers' in the 1980's for blanket weed control in farm ponds. Lately I'm reading more about this being attributed to people in the middles age, but of course there's no documentation. In both cases the algae referred to is blanket weed (string algae), never green water algae. I've never been swayed by old tales.The dose given was 2.57 grams per cubic meter. For US pond owners that works out to about 0.3 oz of straw per 1,000 US gals of water. Most sellers of barley sell 4 to 16 oz bags to treat 1,000 gals. I assume a handful of straw would seem unbelievable to buyers where a 4 oz "looks about right". On Saturday, March 28 several members of the Environmental Commission piloted an all natural algae control measure at Tommy's Pond. The installation of bales of barley straw should combat the growth of the algae during the summer months. Read the fact sheet for more information.