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.
Some breeders do daily water changes of 10% that takes less of a toll on the fish. With this method, the fry grow faster and bigger. Daily water changes also tend to level off the ammonia and pH readings avoiding the peaks and valleys. TEMPERATURE. Guppies like their tank water to be between 75-82 degrees F, with 78 degrees an ideal temperature.