Black PVC tubing has a thicker wall than kink free tubing which makes it more durable and long lasting, yet it is very flexible and can withstand 50 PSI of pressure. It can be glued to Schedule 40 PVC fittings for more secure connections.


Ammonia is one of the most common killers of fish. It is the main waste product produced by fish and can become dangerously high from overfeeding, spawning, inadequate filtration or over crowding.