INDUSTRY BRIEFING LEFT TO RIGHT:
Tim, Colin, Bob, Alex and Chris.
JUST AS
important as checking the pH and chemical levels, it is a good policy to regularly test the water turbidity
COLIN DAY
FISPE - sales manager of The Tintometer Ltd.
For the test we decided to use a very popular Jolly Gel Turbidity results
The turbidity testing took place over a 5 day period and the results were impressive as you will see from the graph. Whilst test pool No 4 started out looking visually good with a turbidity reading of 0.4NTU (being 0.1 NTU below the PWTAG Standard), even so Jolly Gel improved the water clarity by taking the level down to: 0.27NTU which is far better than the 0.5NTU standard set by the PWTAG. Perhaps even more impressive was the results for
Date
28-Jun 29-Jun 30-Jun 01-Jul 02-Jul 03-Jul 04-Jul 05-Jul
1.2 1.4
0.2 0.4 0.6 0.8 1
0 27-Jun 28-Jun 29-Jun 30-Jun 01-Jul Date Pool 4 Pool 5
Tests Initiated by C Day FISPE current ISPE President - Lovibond Tintometer Results verified by C Carr FISPE - CC Filtration Services on behalf of MSI International
02-Jul 03-Jul 04-Jul 05-Jul 06-Jul Pool 4
FC / PPM 1.8
Pool 4
Turbidity 0.39
1.71 1.58 1.52
no data no data 0.34 0.33 0.31 0.3
0.27
flocculent used for swimming pool filtration, namely MSI’s Jolly Gel. Plastipack agreed to provide two of their test pools, being 004 (appearing visually good) and 005 (appearing visually cloudy). To ensure our test results were accurate we enlisted
July 2019
July 2019 REGISTERED
the assistance of Colin Day FISPE – sales manager of The Tintometer Ltd. As well as being an expert on water chemistry, Colin is also the current President of the Institute of Swimming Pool Engineers. Colin bought along a brand new Tintometer turbidity meter and gave some very useful on-site training to all involved.
pool No 5, as this pool was initially in a very poor condition with a turbidity reading of: 1.28 NTU. After just four days the turbidity level reduced to 0.28NTU and although there was a slight rise at the end of 5 days it was still within the 0.5NTU Standard set by the PWTAG. In fact if you take the standard of 0.5 NTU and rate it at 100% then the best results from the two pools was close to 50% better than the PWTAG standard.
Pool 4
Temperature / °C 28
weekend weekend 30 30
30.25 30.75 30.5
Pool 5
FC / PPM 2.19
Pool 5
Turbidity 1.28
1.99 1.32 1.94
no data no data 1.24 0.79 0.29 0.28 0.3
Pool 5
Temperature / °C 27.5
weekend weekend 30.5 30.5 30.5
30.75 30.75
TURBIDITY TESTS Colin went on to
PWTAG Standard 0.5NTU
stress the importance of measuring the pH and chlorine levels at different areas around the pool, as if they were not properly controlled they could adversely affect the results. Additionally, Colin took turbidity test samples from several areas around the pool, and it became evident that the highest turbidity readings were from the deepest part of the pool, so it was agreed that this would be the best place
to take samples for the ongoing tests. Flocculation and the improvement of turbidity levels
is not instant and usually takes a few days to reach optimum levels, so to monitor the turbidity levels on a daily basis and relay the results to Chris Carr for analysis. An important point to note is that for the flocculent
to work at its optimum the water temperature ideally be over 20°C to ensure effective results. The turbidity testing took place over
five day period and the results were quite impressive as you will see from the graph below. Whilst test pool No 4 started out looking visually good with a turbidity reading of 0.4NTU (being 0.1 NTU below the PWTAG Standard), even so Jolly Gel managed to improve the water clarity by taking the level down to: 0.27NTU which is well below the 0.5NTU standard set by the PWTAG. Perhaps even more impressive was the results for pool No 5, as this pool was initially in a very poor condition with a turbidity reading of: 1.28 NTU. After just four days the turbidity level in this pool was reduce to 0.28NTU and although there was a slight rise at the end of five days it was still within the 0.5NTU Standard set by the PWTAG. It is worth bearing in mind that these
test pools are outdoor and can be affected by wind born pollution which we believe is the reason why there was a slight increase in the turbidity reading for pool No 5. In any event, the results prove that the Jolly Gel flocculent works extremely well and is an excellent way to give your pool water that extra sparkle.
Chris Carr Filtration Services
chris@cc-filtration.co.uk 01795 841747
poolandspascene.com 51
Turbidity
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