Hydrometer need 40 meh ?? Get those plastic swing-arm type RM20+ enough loooo....
Test Kits 40 ?? Maybe more than that lah ... NO2 one about RM20, NO3 one about RM35, KH, PH about RM15 each ...
Can use our tap water, but the silicate deposits from our tap water will introduce ugly diatom (brown) algaes. Recommended to use mix salt-water for at least 1 day before introducing it into the tank.
Salt-water aquarium is easier to keep (provided u have appropriate equipments) compared to fresh water IMHO.
btw goldfries, myfish.info forum is very dead lah ... those who wanna find out more about reef tank and marine fishes pls visit http://www.myfish.info
Saltwater fish and reef tank keepers, All about saltwater creatures and reef