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Must be UV I think, The fiber glass wall below water level looks original colour (obviously it is wet) The fiber glass wall above water level when wet looks original (albeit a little more dull) CSI is low CH is very low (and no calcium in Fiber Glass Shell or gelcoat)

Thanks all, I have a very faint white line (right on the water line) and then the rest of the fibreglass above the waterline is dulled. The UV here is extremely harsh, would this likely be UV oxidation? My CH Levels have always been low and CSI is negative, so I doubt it's calcium scale. Just...

Thanks Crad. Actually went back to the owners manual for the pool and they basically say CH level of no more thank 150, and in the next sentence to not ever add calcium to the water. Would a balanced approach here to simply increase the CH level to maybe 100-120ish and move on with my life 😀

Do you think I should increase the CH a little? Having trouble getting the CSI in line without increasing the CH level. Very confused.

Thanks all. I do track my CSI it is -1.05. However due to my pool not having calcium in its construction the reading throws me. I feel that the CSI calculator does not take into account fiber glass pools with no calcium in the shell or gel coat. Any thoughts or leave as is?

Hi all Just hoping for a general sanity check. I have a fibre glass pool which I have confirmed to NOT have calcium in the gel coat. Im currently running these numbers. Does this look like a safe pool balance? Just wanting to make sure I lool after the shell PH:7.3 TA: 70 CYA: 40 CC: 0 FC...

Thankyou Brett, that makes a lot of sense. Would I be best to have the robot running round the pool (to stir any sediment up), although mind you doesn't appear to be much. Or just leave and potentially vacuum to waste at the end? Also would you recommend running the pump on a lower speed? Ive...

Hi, it seems to be a quality one. Big brand name here Hy-Chlor

Update, forgot to mention I added some clarifier to the pool about 16 hours ago, doesn't seem to be doing much as yet

G'day all Over the weekend we had an extensive amount of rain which has allowed a bunch of dirt / soil to enter the pool. The pool now has a very cloudy brown look to it. The bottom of the pool is clean, just microscopic dissolved dirt particles. I've tested the water with my Clear choice Labs...

Hi all We had a new pergola installed adjacent to our fibreglass pool. Seems a bunch if metal shavings, (likely from when they were installing the metal roof) have made their way into the pool. I now have a bunch of small rust marks. It's not the end of the world, but ideally I'd like to...

Thanks Yann for the CSI advice. I've really nailed looking after the pool, particularly since grabbing the CCL kit. I've got a nice little workflow working which is great. Love the forum

Hey mate. I would highly recommend getting the full Clear Choice Kit. Your gonna need it. Fellow Aussie here mate

Hi Amlez Fellow Aussie here mate also with the CCL kit, which is fantastic. I bought an Apera PH20 pH meter off Amazon as a confirmation tool and have found it very useful. It also helps you to practice interpreting the colour scale.

Loving the Windows 10 App! Nice using it on the big screen. Keep up the good work

Thanks duraleigh The fill water is very low in CH, 50ppm Should I bump up my CH to 220 as per TFP guidelines or follow Leisure Pools (pool manufacturer) recommendation at no more than 120? Cheers

Still a bit confused about CSI As mentioned above I have confirmed with my fibreglass pool manufacturer that there is no calcium in the gelcoat or filler, so not sure I need to be too concerned but wanted to double check. Here's todays numbers PH: 7.4 FC: 5 CC: 0-0.5 TA: 80 CH: 150 CYA: 60...

Thanks mate, can a mod please close this off :) I'll ask a few more questions in my other thread

Hi everyone Got our 1 Year old Fibreglass pool running great at the moment, thanks to the wonderful resource this website is! But I have a question regarding CSI, it's sitting at -0.82 I have confirmed with my fibreglass pool manufacturer that there is no calcium in the gelcoat or filler, so...

Thanks all for your help!

Hi all! Thanks for all the advice Another quick questions, this time in regards to FC. I just tested the FC (the SWCG had been running for around 3.5 hours) and the FC was 6.5. The day was very overcast, not a lot of sun. The only thing is I have the Chlorinator turned down to 3 (there are 8...

Leisure Pool have in BOLD type in their manual to keep pH between 7.2 and 7.4. Is there any issue running the pH a little higher than that? Thanks

Hey Costas! Gees you guys have had your share of hot weather! Thanks for the reply Im a little confused with CSI, particularly with a fibre glass pool with no calcium in the construction. My understanding is the water may be looking for calcium but without calcium in the pool construction it...

Phil Welcome mate! Fellow Aussie here. Brett I'm in for a 3d printed stand for the Clear Choice Labs test kit 100%

Hi all My name's Luke, I'm from Sydney Australia and yes it has been around ~42c (108F) for a couple of days, not fun :) I'm a relatively new pool owner (round 12 months), have been riding the pool shop merry go round and finally decided to really understand my pool. That's where TFP came in...