LQ users have been talking about flow issues in a couple of threads. Some talked about removing the flow meter altogether because the “white stuff” in it blocks the flow.
So here’s a question:
Suppose your bather load and sunlight intensity don’t change and suppose you took steps to protect the bleach in the tank from UV exposure . Suppose you finally found that “sweet spot” on your flow control valve that gives you the desired FC feed into the pool.
Does that mean that from now on, all you have to do is keep feeding the tank with bleach
from time to time, and you’d keep a steady and almost unchanging supply of FC to your pool?
I made initial tests to verify what the theory says, although more are needed and your input can verify what is expected.
The level of FC at the top layer gets lower the lower the border between the yellow
layer and the upper layer gets closer to the bottom. The reason is that FC travels to the top by diffusion. The farther it has to travel, less of it will get there.
My own test results: At one point, when the border was high up the level of FC at the top was 231 ppm. When the yellow bleach bed was only about 2” deep, the level of top water FC was 98.
This means that the water entering the pool become less enriched with FC as the level of the bleach bed goes down. Therefore, in order to keep the same feed rate, you need to either keep adjusting the flow, increasing it as you lose bleach, or keep the bleach level about the same all the time.
What is you experience?