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.
Rising PH- Whats causing it? Hi. we,ve set up a 150 gallon tank about a month back. had a few ammonia issues because of overstoking...thats settled now and we are'nt losing fish but our ph is reading 7.5. our test kit only reads till 7.5, so we not sure if its higher.