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POOL / HOT TUB > POOL > Flashcards

POOL Flashcards

1
Q

POOL

9 Step management cascade

A
  1. Skim surface
  2. Skimmer basket cleanout
  3. Brush sides
  4. Vacuum (auto)
  5. Water chemistry
  6. Shock?
  7. Rinse off deck
  8. Salt cell check
  9. Main
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2
Q

POOL

Ideal amount of time to wait after chemical addition before retest water chemistry

A

30 min

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3
Q

POOL

Ideal alkalinity range

A

100 - 150 ppm

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4
Q

POOL

Why alkalinity important in a pool?

A

Alkalinity buffers pH by minimizing effects of environmental factors

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5
Q

POOL

Managing low alkalinity

A

Most common fluctuation

Add sodium bicarbonate (baking soda), AKA alkalinity increaser

Sprinkle on surface, brush excess on bottom until dissolves.

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6
Q

POOL

Managing high alkalinity

A

Add muriatic acid

Sprinkle on surface, brush excess on bottom of pool until dissolves

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7
Q

POOL

pH Ideal range

A

7.2 - 7.6

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8
Q

POOL

Two primary factors that effect pool pH and why important

A
  1. Most common problem is being to acidic, usually caused by recent rain
  2. Lots of people swimming with oils or sunblock will shift pool to basic (high pH)

Sanitizer will be far less effective if pH is not in ideal range

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9
Q

POOL

Managing to acidic (low pH)

A

Soda ash/pH increaser

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10
Q

POOL

Managing to Basic (high pH)

A

Muriatic acid

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11
Q

POOL

Ideal range for Calcium Hardness and why important

A

200 - 275 ppm

If to high will cause ‘scaling’. Generally pretty stable.

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12
Q

POOL

managing low calcium hardness

A

Add ‘calcium increaser’

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13
Q

POOL

managing high calcium hardness

A

Add fresh water to pool and retest after 30 min

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14
Q

POOL

Ideal chlorine sanitizer levels

A

1-3 ppm

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15
Q

POOL

Difference between Total, Free, and combined chlorine

A

TC = FC + CC

FC - chlorine free to attack biologics
CC - Chlorine already attached to biologic, not available for sanitization.

FC should always be higher then CC in a healthy pool

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16
Q

POOL

How does chlorine sanitizer fxn?

A

Kills bacteria, parasites and viruses by destroying cell walls

17
Q

POOL

How does salt cell work?

A

Electrolysis on salt water (NaCl) produces hydrochlourus acid (HCLO).
This further breaks into chlorine gas (cl2), hydrogen gas (h2) and sodium hydroxide (NaOH) which is lye. This is often added to pools to raise pH, so the cell creating it as byproduct creates benefit of maintaining acidity level in pool

18
Q

POOL

Ideal stabilizer levels and why important

A

Cyanuric acid (CYA)

40 ppm in regular pool, up to 80 ppm in salt water pool

Sunlight degrades chlorine at 1ppm/hour unless stabilizer present to slow degredation.

19
Q

POOL

Two types of water clarifiers

A
  1. Clarifier/coagulant - Makes tiny particles clump togehter so filter can remove them. Generally need to clean out filter after a strong use

2 Floculant/ Floc - much strong coagulant, creates bigger clumps that fall to the bottom of the pool and have to be vacuumed out.

20
Q

POOL

Algicide frequency and type

A
  • Generally correct chlorine levels will manage algae
  • Can use small amounts as a weekly preventive shock.
  • MC used if a disruption in regular pool care that allows algea bloom - sick, vacation, etc.
  • Use Polyquat 60 - aka algicide 60
21
Q

POOL

Shock - general purpose and frequency

A

Raising sanitizer levels far above normal for short time to destroy all organics.

1x/week during regular swim season

Ideal for:
High swim volume (party/guests)
acute algae bloom
sanitation even - someone shit the pool

22
Q

POOL

Shock method

A

Shock added after sun goes down to minimize solar degredation

Run pump for minimum 8 hours to keep entire pool and plumbing at high sanitation level

23
Q

POOL

Trichlor sanitizer and Shock (5)

A
  • 90% chlorine in dry tablet + CYU. Highest sanitizer level can get for pool
  • 10:6 ratio of CHL:CYU
  • CYU generally doesnt degrade = constant raising levels if using lots of Trichlor, so monitor to be certain not to high.
  • Slow dissolving to allow for gradual release into pool
  • LONG shelf life
24
Q

POOL

Dichlor shock sanitizer (3)

A

55-62% chlorine + CYU

Granular or tablet

Quick dissolbing

25
Q

POOL

Non-chlorine shock (3)

A

Potassium proxymonosulfate

More expensive but full effect in 15 min

No CA increase in water

26
Q

POOL

Calcium hypochlorite (CAL HYPO) shock (2)

A

40-80% chlorine

Saltwater pools - minimize use b/c raises calcium levels significantly which can lead to scaling of inside of salt cell generator = decreasing chlorine generation

27
Q

POOL

Daily turnover rate goal

A

Full volume of pool water through filter

Means 8 hours filtration minimum. The more the better.

28
Q

POOL

Water chemistry testing method

A

Liquid more accurate then strips, but strips still good enough for daily/weekly monitoring. Use liquid if something seems off.

  1. Water into container from mid water depth, NOT near skimmers or returns.
  2. Put container mouth down into water, down to elbow level
  3. Turn container right side up, will fill with water at that level
  4. Bring container out, use test strip.
29
Q

POOL

Specific order of water chemistry testing.

A
  1. Alkalinity
  2. pH
  3. Calcium hardness
  4. Sanitizer
  5. CYU
  6. Algicide?
  7. Clarifier?
  8. Shock

POOL / HOT TUB (1 decks)

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