cleaning removes unpleasent and unsightly Algae from the tank and
improves clarity. Waterchanges replenish or remove pH, nitrite and
ammonia levels. Gravel vacuming removes organic bacteria that grows in
the gravel and effects the nitrite and ammonia levels. Filter cleaning
is essential for clear water and removal of waste that can effect
chemical balances. All filters use carbon and overtime the carbon loses
it's ability to draw out water.