| ค่าที่ควรจะเป็นของแคลเซียม บัฟเฟอร์ และแมกนีเซียม
| Table 1. Parameters critical
to control in reef aquaria. |
| Parameter: |
Reef Aquaria Recommendation: |
Typical Surface Ocean Value:1 |
| Calcium |
380-450 ppm |
420 ppm |
| Alkalinity |
2.5-4 meq/L
7-11 dKH
125-200 ppm CaCO3 equivalents |
2.5 meq/L
7 dKH
125 ppm CaCO3 equivalents |
| Salinity |
35 ppt
sg = 1.026 |
34-36 ppt
sg = 1.025-1.027 |
| Temperature |
76-83ฐ F |
Variable2 |
| pH |
7.8-8.5 OK
8.1-8.3 is better |
8.0-8.3 (can be lower or higher in lagoons) |
| Magnesium |
1250-1350 ppm |
1280 ppm |
| Phosphate |
< 0.03 ppm |
0.005 ppm |
| Ammonia |
<0.1 ppm |
Variable (typically <0.1 ppm) |
| Table 2. Other parameters
in reef aquaria. |
| Parameter: |
Reef Aquaria Recommendation: |
Typical Ocean Value:1 |
| Silica |
< 2 ppm, much lower if diatoms are a problem |
<0.06 - 2.7 ppm |
| Iodine |
Control not recommended |
0.06 ppm total of all forms |
| Nitrate |
< 0.2 ppm |
Variable (typically below 0.1 ppm) |
| Nitrite |
< 0.2 ppm typically |
Variable (typically below 0.0001 ppm) |
| Strontium |
5-15 ppm |
8 ppm |
| ORP |
Control not recommended |
Variable |
| Boron |
< 10 ppm |
4.4 ppm |
| Iron |
Below Kit Detection Limits (additions OK) |
0.000006 ppm |
จริง ๆ คิดไว้นานแล้วว่าถ้าความเค็มเปลี่ยน ค่าที่ควรจะวัดได้ควรจะเป็นเท่าไหร่
ผลการคำนวน
ความเค็ม 35 ppt ค่า Alk = 7-11 dKH หรือ 2.5 - 4 mEq/L
ความเค็มที่ x ค่าที่เหมาะคือ 7x/35 - 11x/35..................1 dKH
หรือ 2.5x/35 - 4x/35.....................................................2
mEQ/L
แคลเซียม 380 - 450 ppm
หรือ ความเค็ม x
380x/35 - 450x/35
แคลเซียม/ อัลคาไลนิตี้
380/7 = 54.285..................k1
380/11= 34.5454 .............k2
และ 450/11= 40.909..........k3
450/7= 64.286..................k4
good point = ระหว่าง k1 กับ k3
borderline point = ระหว่าง k2 กับ k4
range buffer in water = 7 * ppt/ 35
range Calcium ในน้ำ = 380*ppt/35
| ppt |
34Ca/ppt35 |
Ca/ppt high |
Buff /ppt |
buff/ppt high |
Buff from K2 Ca |
K3B |
K1B |
K4B |
Holme ref b |
holme ref ca |
|
| |
380 * ppt/ 35 |
450*ppt/35 |
7*ppt/35 |
11*ppt/35 |
a/34.5454-b/34.5454 |
a/40.909-b/40.909 |
a/54.285 - b/54.285 |
a/64.286-b/64.286 |
1.4 |
350 |
|
| 0 |
0 |
0 |
0 |
0 |
|
|
|
|
2.1 |
375 |
0 |
| 20 |
217.14285 |
257.14284 |
4 |
6.2857135 |
6.285724-7.4436202 |
5.3079841 |
4.0000525 |
3.3777626 |
|
|
|
| 25 |
271.42855 |
321.42855 |
5 |
7.8571427 |
7.8571546- 9.3045253 |
|
|
|
|
|
|
| 28 |
303.99997 |
359.99997 |
5.6 |
8.8 |
8.8 |
|
|
|
5.6 |
400 |
|
| 29 |
314.85711 |
372.85711 |
5.8 |
9.1142854 |
9.1142xx |
|
|
|
9.1 |
425 |
|
| 30 |
325.71428 |
385.71426 |
6 |
9.4285708 |
9.4285xx |
|
|
|
12.6 |
450 |
|
| 31 |
336.5714 |
398.5714 |
6.2 |
9.7428562 |
9.7428xx |
|
|
|
16.1 |
475 |
|
| 32 |
347.42854 |
411.42854 |
6.4 |
10.057142 |
10.057xx |
|
|
|
|
|
|
| 33 |
358.28568 |
424.28568 |
6.5999997 |
10.371428 |
10.371xx |
|
|
|
|
|
|
| 34 |
369.14282 |
437.14282 |
6.7999995 |
10.685713 |
10.685xx |
|
|
|
|
|
|
| 35 |
380 |
450 |
7 |
11 |
11 |
|
|
|
|
|
|
| 36 |
390.85711 |
462.85711 |
7.199999 |
11.314825 |
11.314xx |
|
|
|
|
|
|
| 37 |
401.71425 |
475.71425 |
7.3999996 |
11.62857 |
11.62xx |
|
|
|
|
|
|
| 38 |
412.57139 |
488.57139 |
7.5999994 |
11.942856 |
11.942xx |
|
|
|
|
|
|
อ้างอิง
Randy Holme Farley ; Reef Aquarium Water Parameters ; Reefkeeping Magazine
2004-05;
|