cloudy pool - DE or algae

Jun 22, 2012
10
0
Smithtown, NY
#1
Hi, newbie here - be gentle ;)

Pool was closed for 1 year - I've gotten a (newer) replacement filter + dolphin pool cleaner & opened the pool this year. As expected, uncovered to a swamp. In addition, there was a prior problem with DE filter where the earth was leaked into the pool.

Been following the BBB method - 1 week in now & shocking as recommended. Pool cleaner has been running 2-3times a day. Early cleanouts had tons of goo - recent ones seem limited to gray silt.

Current AM level, per K-2006 readings:

FC - 2.2
PH - 7.4
TA - 150
CH - 80
CYA- 30

Overnight test seems to lose 1.0 FC - but its +90 degrees now, so that maybe a factor.

Problem is - pool is still not clear - can't see bottom of pool @ deep end. Slight gray color, but could be due to DE vs dead algae. I haven't added any DE to the filter yet - was afraid to do so until the water is clear enough to determine whether filter isn't dumping DE. (re: filter - Disassembled it, visually checked all "fins" for tears, checked all plastic parts for cracks. Just being overly cautious ).

Was wondering if I should be doing more shocking, considering a clarifier, or just waiting? Reason for considering the clarifier: the pool cleaner could be stirring up the DE (if that's what it is) making things cloudy.

If a clarifier is the way to go, any BBB suggestions?
 

linen

LifeTime Supporter
TFP Expert
Jul 30, 2010
8,649
0
48
Twin Cities, MN
#2
Welcome to tfp, jimg :wave:

What is your CC level?

How are you getting your test numbers?

What is your filter "clean" pressure?
At what pressure are you cleaning or backwashing your filter at?
 

JasonLion

LifeTime Supporter
Platinum Supporter
TFP Expert
May 7, 2007
37,879
5
Silver Spring, MD
#3
You shouldn't run the filter without DE. Too much time without DE can permanently damage the grids. If you can't put DE in the filter you should run on recirculate (which bypasses the filter completely).

DE settles to the bottom of the pool after only a few hours with the pump off, at which point you can vacuum it up. From your description, that makes it unlikely that DE in the pool is your problem. Also, if you do add DE, a torn grid will be instantly obvious as the return jets will become cloudy a few moments after you add DE to the skimmer.

Try filtering normally with DE in the filter for 24 hours before considering trying clarifier.
 

duraleigh

Admin
Mod Squad
LifeTime Supporter
Platinum Supporter
TFP Expert
In The Industry
Apr 1, 2007
31,264
3
Sebring, Florida
tftestkits.net
#4
Welcome to the forum. :lol: Actually, you never finished the shock process so your FC should still be up around 12ppm. The criteria you must meet to finish shocking are...
1. Your pool water is sparkling
2. Your CC's are .5ppm or less
3. You can hold your FC overnight without losing more than 1ppm.

From your description, you probably need to get the robot in there and have him do some more work. Brush, stir things up, backwash your filter.....do everything you can to mechanically remove the junk.....all the time keeping your FC at shock level.
 
Jun 22, 2012
10
0
Smithtown, NY
#5
Thanks for all the advice.

@linen
What is your CC level?
CC = 0.4
How are you getting your test numbers?
test numbers from K-2006 (purchased based on TFP recommendation)
What is your filter "clean" pressure / At what pressure are you cleaning or backwashing your filter at?
20 clean, 28 when I backwash.

@duraleigh
Yes - TC was 9.7 / 9.0 for 3 days. tested in am & pm, put shock in pm. Last two days I figure that it was shocked enough, so I stopped dumping shock level bleach since I didn't know if the condition was due to DE or algae. After day one of hitting hard, pool started to clear, but gray remained.

@JasonLion
Thank you - will go buy DE and put it in. And more shock, just in case. will post pictures for additional info.
 
Jun 22, 2012
10
0
Smithtown, NY
#8
Put 4 coffee cans of DE in the skimmer - and saw white coming out of the returns. :(

So now I am working overtime to figure out 1) where the DE leak is and 2) getting the additional DE out of the pool.

I've put the system in recirculate until I can find the problem. Spider gasket looked okay - as did the manifold and individual grids (disassembed entire DE unit at beginning).

Should I consider stopping the pump and relying on the robot cleaner to pick up the DE?

Or just run the pump in recirc and skimmers only while keeping the robot cleaner busy?
 
Jun 22, 2012
10
0
Smithtown, NY
#11
I did a OCLT last week and lost 0.8 - but I will attempt again this evening.

Current readings:
FC 5.2
CC 0.0
PH 7.6
TA 150
CH 80
CYA 30
System in recirculate

I've just added bleach to bring to 15 shock level & will monitor. Robot Pool cleaner is [still] working away (still pulling out gray stuff, clean out 3 times daily).
 

techguy

LifeTime Supporter
TFP Expert
Jul 21, 2010
2,697
0
55
Antelope, CA
#12
With the system in "Recirculate", it's never going to clear because you are not filtering. The water is going into the pump and directly back into the pool and bypassing (not going into) the filter.

If when you run it in "Filter" you get DE blowing into the pool, you have a hole in one of the DE filter bags like you show above. You need to get that fixed and the filter charged with a full load of DE before it can effectively filter the pool.

Unless I missed something here...
 
Jun 22, 2012
10
0
Smithtown, NY
#13
Hi Techguy.

The bag in the picture above is not from the DE filter - its from the dolphin plus robot cleaner.

I did inspect the DE filter / manifold / grids and did not see any holes / leaks. I will disassemble shortly and review.
 
Jun 22, 2012
10
0
Smithtown, NY
#14
Filter completed. Didn't see anything out of the norm. removed the grids, reseated them, put some sealant around the connectors at the manifold end, and restarted. 9 coffee cans of DE - didn't see any white in the returns. I'll run the filter all night just to see (only pulling from the main drain [skimmers off] to see if the filter can clear the deep end.
 

techguy

LifeTime Supporter
TFP Expert
Jul 21, 2010
2,697
0
55
Antelope, CA
#15
Sounds like maybe things will clean up now. I didn't understand your robot had it's own filter, My robot (Aquabug) uses my DE filter and clogs it quickly if my pool is dirty. Sometimes I have to bump my filter every 20 minutes when fighting an algae bloom. This is when a DE filter can be a real pain in tail. But... when all is going good, the water is great looking.

Corrected an iPad-ism.
 
Jun 22, 2012
10
0
Smithtown, NY
#16
After 2 days, pool is clear now. I did clean the grids with acid and seal the connections to the manifold with "hot glue" so perhaps something was amiss there. Thanks for all your suggestions - you guys are lifesavers!