Calculating the volume of pools & spas, Acid demand & ph adjustment – LaMotte DPC-52 Water Testing Laboratory User Manual
Page 13
CALCULATING THE VOLUME OF POOLS & SPAS
Measurements in Feet
Rectangular Shape: Length x Width x Average Depth x 7.5 = Volume in gallons
Round Shape:
Diameter x Diameter x Average Depth x 5.9 = Volume in gallons
Oval Shape:
Length x Width x Average Depth x 5.9 = Volume in gallons
ACID DEMAND & pH ADJUSTMENT
The Acid Demand Index states the amount of Muriatic Acid (Hydrochloric Acid 31%)
required to reduce high alkalinity in pool or spa water to an optimum range of 80 - 120
ppm CaCO
3
. This table is used in conjunction with the alkalinity test result; see the
Alkalinity test procedure.
MURIATIC ACID REQUIREMENT
Alkalinity
Reading ppm
CaCO
3
Pool or Spa Volume in Gallons
100 250 500 1000 2500 5M 10M 20M 25M 50M
120
1
1
3
5
1
2
3
7
8
16
135
1
2
5
1
1
3
6
11
14
29
155
1
4
7
1
2
4
9
18
22
45
170
2
5
1
1
3
6
11
23
29
57
190
2
6
1
1
4
7
15
29
37
74
205
3
7
1
2
4
9
17
34
43
86
220
3
8
1
2
5
10
20
39
49
98
240
4
1
1
2
6
11
23
46
57
115
255
4
1
1
3
6
13
25
51
63
127
275
5
1
1
3
7
14
29
57
72
143
290
5
1
2
3
8
16
31
62
78
155
310
5
1
2
3
9
17
34
69
86
172
325
6
1
2
4
9
18
37
74
92
184
340
6
1
2
4
10
20
39
79
98
196
375
7
1
2
4
11
22
45
90
112
225
410
1
1
3
5
13
25
51
101
127
254
445
1
1
3
6
14
28
56
113
141
282
480
1
2
3
6
16
31
62
124
155
311
515
1
2
3
7
17
34
68
136
170
339
Ounces Muriatic Acid
Pints Muriatic Acid
WEIGHT & VOLUME CONVERSIONS
Pints Muriatic Acid x 16
=
Fluid Ounces Muriatic Acid
Pints Muriatic Acid
÷ 8
=
Gallons Muriatic Acid
Fluid Ounces Muriatic Acid x 0.09
=
Pounds Dry Acid (Sodium Bisulfate)
Pints Muriatic Acid x 1.4
=
Pounds Dry Acid
Gallons Muriatic Acid x 11.2
=
Pounds Dry Acid
13