I was at HomeDepot and i saw these water crystals in the plant section. Does anyone here know if they can be used on feeders?
http://www.amazon.com/Scotts-Miracle-Water-Storing-Crystals/dp/B0042YYVYG
http://www.amazon.com/Scotts-Miracle-Water-Storing-Crystals/dp/B0042YYVYG