My FC has been pretty stable at around 20. Since I started the slam. This morning I did a backwash since the return flow seemed a bit too low.i At lunchtime the FC had dropped to about 17. I just picked up some more chlorine but before I put it in I noticed there was more algae on bottom then there has been since I started slam. This time the algae looked lighter in color (lighter brown/dark green) where from my original pics it was very dark blown or black. Just curious as to why it looks like there’s more algae now from when I started slam.
Pool is clear but keep getting dark spots on liner
- Thread starter jaspers95
- Start date
- Jun 24, 2021
- 16,074
- Pool Size
- 29000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
cool, so then things are working. as expected I guess. So when I see all that dead algae again should I brush it and let it all “poof” or let my robot cleaner get it ?
- Jun 24, 2021
- 16,074
- Pool Size
- 29000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
Does the order matter much? Seems like I should use the robot to clean first then brush it
- Jun 24, 2021
- 16,074
- Pool Size
- 29000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
Nah, both at the same time, brush, robot, robot brush...the more the merrier.
Finally passed the 3 slam test this morning. What are next steps to get levels down to normal? should I get my Cya up to at least 60 first since I’m at only 45?
Well, it depends....
Standard recommendation is to get CYA (with a SWCG) up to 60-90. As you likely know, the CYA helps protect against rapid Cl loss due to sun during the day. That goal has been established over the years as a good starting place for most situations. As for me? I like to run a little lower - about 50. Then I can dial back the SWCG a bit, and maintain a lower, but still effective, Cl level. BUT - in Minn., I don't have near the blistering sun levels other places get, nor heavy swimmer loads, etc. So my daytime Cl loss is lower, and I don't have as much risk of dropping too low.
Run all the tests again - but from earlier posts all you need is to add CYA and bump up your pH. Those can be done at the same time. Turn down your SWCG, and allow the level of Cl to drift down to your new goal (based on your final actual CYA numbers). Then play the game of balancing the "strength" of the SWCG and pump run time to maintain a steady level. That will change as the weather heats up, sun angle changes, pool gets more/less use, etc. Once I find a good stability set of settings, I may only need to test Cl twice a week, and may only do the whole range every couple of weeks, just to check.
Standard recommendation is to get CYA (with a SWCG) up to 60-90. As you likely know, the CYA helps protect against rapid Cl loss due to sun during the day. That goal has been established over the years as a good starting place for most situations. As for me? I like to run a little lower - about 50. Then I can dial back the SWCG a bit, and maintain a lower, but still effective, Cl level. BUT - in Minn., I don't have near the blistering sun levels other places get, nor heavy swimmer loads, etc. So my daytime Cl loss is lower, and I don't have as much risk of dropping too low.
Run all the tests again - but from earlier posts all you need is to add CYA and bump up your pH. Those can be done at the same time. Turn down your SWCG, and allow the level of Cl to drift down to your new goal (based on your final actual CYA numbers). Then play the game of balancing the "strength" of the SWCG and pump run time to maintain a steady level. That will change as the weather heats up, sun angle changes, pool gets more/less use, etc. Once I find a good stability set of settings, I may only need to test Cl twice a week, and may only do the whole range every couple of weeks, just to check.