a cylindrical case of cardboard, metal, etc. containing the charge and primer, and usually the projectile, for a firearm. any of various small containers, holding a supply of material for a larger device into which it is inserted: an ink cartridge for a pen, a toner cartridge for a desktop printer. a protected roll of camera film.
Green Hair Algae is caused by excess Dissolved Organic Carbons or DOCâs in the water. The most common reasons for having too many DOCâs include overfeeding, lack of filtration and the use of tap or well water for water changes or freshwater top off.
No, you should never swim in the pool while it is being treated with chemicals. These chemicals can be absorbed through your skin while swimming, which can be harmful. Copper-based algaecides, which are used for treating black algae, can cause staining, and can even turn blonde hair green.