Corals turning brown.

[wa_lanz]

understand that sps will turn brown if nutrients is high but will LPS turn brown too if nutrient level is high?

1)currently using a macro venturi. 800L model. would it be enuff for a 460L tank?

2)how many hrs of lighting is best? currently using 2x150w and 1 actinic. if i on more than 12 hrs a day would it affect the corals colouration??

[Achilles Tang]

Barring all other factors, corals will generally darken when the nutrient levels are high, be it SPS or LPS.

1. Really depends on your bioload and your husbandry skills.

2. 12 hours would be alright. If you have intense lighting, you can get away with 9 - 10 hours.

[wa_lanz]

other than reducing bioload, reducing feeding and changing skimmer.

any other ways that can reduce my nutrient levels?? grow some algae in my tank?

[iewnehz]

other than reducing bioload, reducing feeding and changing skimmer.

any other ways that can reduce my nutrient levels?? grow some algae in my tank?

algae is to export nutrients out of the tank