Via:
Overnight Chlorine Loss Test
So as long as you did the FAS-DPD FC & CC tests carefully and correctly, and there was at least 8 hours of pump running, yes, you passed OCLT.
Yes, your passed OCLT indicates that you have a lot of dead algae/pollen floating around in the pool and if you desire to speed up the SLAM, enhanced filtration is #1 way.
Procedures to potentially speed up filtration:
1. Stay diligent about your
SLAM Process testing/additions/brushing - slacking here has caused more people extended SLAMing than anything else
2. Filtration run time - 24/7 or as much run time as you can safely get
3. PSI gauge - you have one? It work? Do you know your clean PSI after a proper backwash cycle? Do you know your dirty PSI? How long is it taking right now to get there?
4. Full backwash cycle - pump off, switch to backwash, 2 minutes or until completely clear, off, rinse for 30s or until clear, off, backwash 30 seconds or until clear, off, rinse 30s or until clear, off, back to filter, check and record PSI
5. Slowly vacuum the bottom, very slowly, very very slowly (on filter, not waste)
6. More brushing, especially walls and delicately the corners
7. If there is an area that is less clear than other areas, while manual vac is still hooked up, just leave the vac over in that area so it can mimic having the skimmer right there, sucking the cloudiest water right into the sand filter
8. Don't backwash before 20-25% higher than clean PSI unless water flow strength at return is reduced significantly
9. Backwash before going over 25% higher than clean PSI, even if waterflow is strong still
10. If you are seeing improvement each day in the photos,
consider adding DE or CF to your sand filter as described here (ask any questions before you do it!)! Since a slightly dirty filter catches finer particles, using DE or CF as we direct raises the PSI up by 1 and mimics a dirty filter in a couple minutes instead of days. You'll have to backwash much, much sooner, which means you'll need to check the PSI more often, add more water if rain doesn't replace it, and check things like CYA PH (when FC is under 10) more often to balance the water after the hose additions, but this really does speed up most people with sand filters! Be sure to read all manufacturer instructions on DE, and don't inhale the DE dust or eat it, pool DE is not the food grade stuff anymore. Be sure to check your local laws as some places prohibit backwashing DE and those people have to use CF. Both DE and CF work, just different pros/cons. Both cheap and effective.
11. Skimmer socks/hairnets people have great success with the 100 pack on Amazon for under $10, search the forum if interested
