carbonate hardness <kh> and phosphate <po4>

[i have crabs]

im not sayin its a problem but a dkh of 10.8 seems a little on the high side to have calcium at 410, if calcium was at 410 and alk was 7-8 it would be closer to being balance in my eyes but im not tryin to tell him his tank is gonna explode

[tgoeujon]

thanks. im gonna try doing a water change, changing my filter media and bringing my calcium levels up. ill let ya know what happens

[mark]

no fear if Alk already high and Ca okay, pushing the Ca might cause problems (Ca pcpn) rather than driving the alk down?

See here for NSW and aquarium ranges