1. Current water parameter.
2. Maintenance schedule
3. Operating cost.
4. Source water parameter.

1. Current water parameter
 Date : 18 October, 1998

Items	Value	Tester
Salinity (Note #4)	1.022	Aquarium System SeaTest
pH (3:00am/6:00pm)	8.03/8.22 (see Note #5)	PinPoint pH meter
pH (Ca Reactor)	Suspended	Saga pH Controller
dKH	10dKH	Dupla
Calcium Ion (Tank)	415ppm	Dupla
Calcium Ion (Ca Reactor)	Suspended	Red Sea
ORP (Morning/Evening)	310mV/330mV	PinPoint ORP meter
Nitrite (NO2)	Undetectable	Tetra
Nitrate (NO3)	12.5ppm	Tetra
PO4 (Note #2)	Undetectable (Under 0.015ppm)	Salifert
Temperature (Note #3)	26.4C to 27C	Nisson Digital Thermometer

2. Maintenance Schedule
 

Daily use additives	Dosage
Thiel Aqua Tech Vital Gold	6ml daily
Thiel Aqua Tech Iodine	6 drops daily (see Note #1)
Thiel Aqua Tech Strontium KSM	4ml daily
Kent Calcium CB Part A & B	15ml daily each
Other Maintenance Procedure
Sera Granumarin food for fishes	Small amount every other day
Water Change (Reef Crystal + Duplagan M)	20% Since 1-April-98
Clean Gravel	Never
Clean Protein Skimmer	Bi-Weekly
Clean Filters	Since 12-Aug-97
Check Hose connection	Weekly
Clean & Calibrate Probes	Since 15-October-98
Clean Glass	Every week
Change Active Carbon	Since 1-September-98
Refill DI water	By top off refill system

3. Monthly Cost for Maintenance
 

Additives	HK$  28
Foods	HK$  10
Salt for water change	HK$  25
DI water (Tap water purifier) for water change & refill	HK$  49
Active Carbon	HK$  20
Electricity Bill	HK$200 (I guess)
Total	HK$381

4. Source water parameter
Water sample was taken at Hong Kong Fanling Centre.

	Tap water	Output for Tap Water Purifer (after 180L usage)
Nitrate (Dupla)	5ppm	Under 0.2ppm
PO4- (Salifert)	0ppm	0ppm
dKH (Dupla)	2dKH	Under 1dKH

Note:-
#1. 10-Oct-97,  I have changed the dosing schedule of Iodine from weekly to daily for my 65G tank, I found that Iodine used up rapidly especially you have a powerful protein skimmer, when new fishes are not ready to absorb Iodine from their food they will sick or dead within several days (I lost over 10 small fishes in this situation but lack of Iodine may not the only cause of this problem). Iodine is insufficient in normal Trace Elements supplement, extra Iodine supplement is need.
 

#2. 18-Oct-97, I try to lower down the PO4 level to under 0.03 ppm by using PO4 minus, it works like AZ-NO3 need works together with a protein skimmer, I dose 5ml/day, any result I will put here again. Detail of PO4 minus you can found at Marine Monsters (http://marine-monsters.com).
 

Daily Maintenance Record
PO4 test kit is SALIFERT PO4 Profi-Test, where * is exactly match to the color chart, ? is between two colors.
Date             PO4 Level                    PO4 minus dosage
-----------   -----------------------   -------------------
18-Oct-97   * 0.25ppm (inital level)             5ml
19-Oct-97   * 0.125ppm                             5ml
20-Oct-97   ? 0.1ppm                                 5ml
21-Oct-97   * 0.05ppm                               5ml
22-Oct-97   under 0.015ppm                  Stop here

After four dosage of PO4 minus, the PO4 level reach to undetectable level, no color produced in the testing. I will keep monitoring to see when will it back to 0.05ppm.

#4. This SeaTest has a reading 1.018 for the water sample from Hong Kong Clear Water Bay.

#5. Ottavi hydro-vital pH stabilizer is in use, before using this pH stabilizer the pH is very low, no matter how much buffer is added, the pH range return to 7.8-8.15 very soon and the extra buffer caused deep falling of Calcium.