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.
Hi joe, This fish can be easily bred in a tank measuring 24 (61 cm) with a capacity of 20 gallons (75 L). Water maintenance must be kept up in order for the fish to get in a spawning condition. The water should have a pH from 6.1-6.5, a water hardness of 4-8 dH, and a temperature from 79-82 F (26-28 C).