SAT
Premium Member
Ron,
I'm having trouble with the math you applied to water changes in Table 4. Take, for example, tin. In each 3-week period I'm adding 833% of NSW values. If I change 20% of the water, I have about 666%. So far we agree. However at the end of two cycles I have (666+833) * 0.8 = 1200. After three I have (1200+833) * 0.8 = 1626. At the end of 10 cycles, I have about 2975. At 40 cycles it has stabilized (833 in, 833 out) at 3332. Compare that with 53,550 in your table.
While I have to agree that 3332% is very high, perhaps even unacceptably high, I can't agree with the conclusion that changing water doesn't make a big difference.
I'm having trouble with the math you applied to water changes in Table 4. Take, for example, tin. In each 3-week period I'm adding 833% of NSW values. If I change 20% of the water, I have about 666%. So far we agree. However at the end of two cycles I have (666+833) * 0.8 = 1200. After three I have (1200+833) * 0.8 = 1626. At the end of 10 cycles, I have about 2975. At 40 cycles it has stabilized (833 in, 833 out) at 3332. Compare that with 53,550 in your table.
While I have to agree that 3332% is very high, perhaps even unacceptably high, I can't agree with the conclusion that changing water doesn't make a big difference.