| A | B |
|---|
| PH | concentration of Hydrogen atoms |
| dissolved oxygen | the amount of oxygen dissolved in water |
| parts per million | unit meaning one item in a million |
| alkalinity | the ability of a solution to neutralize acids |
| hardness | the amount of mineral ion present in water such as calcium |
| ammonia | a fish waste product that is toxic in its unionized form |
| nitrate | nitrogen waste converted from ammonia |
| buffering system | the presence of compounds that minimizes the changes in pH |
| plankton | microscopic organism that live in water |
| suspended solids | large solids in water that can be removed by filtration |
| temperature | influences metabolism of fish |
| fish waste | chemical and solid materials excreted by fish in to the water |
