Transcript of Heart Disease and the Excretory System. Heart Disease and the excretory Heart disease slows the oxygen flowing throughout the body. So oxygen moves slower to the excretory system.
The most likely causes of a shift in pH are: 1  Something in the water source buffering the water. 2  Something in the tank buffering the water. 3  or Something you are adding to the tank.
We also encourage algae on the sides and the back of the tank. The fish graze on the algae giving them a good source of plant material. They are very adaptable to different temperatures, from the low 70s to the low 80s. We keep our tanks at about 75 F. The Ph of our system water is nuetral.