Nori and nutrients

[Breakthecycle2]

I see a lot of people leaving nori in their tanks all day. I would like too for my Idols and tangs. I was just curious, doesn't the stuff that breaks off just sit and add phosphates and nutrients to the water?

 

[Fish_BowLisha]

Yep. Better to offer more times a day smaller amounts. They probably just do a lot of water changes to compensate.

 

[Randy Holmes-Farley]

In the end, its only the amount added daily that matters, not what eats it. An adult fish excretes nearly all of the N and P in the nori as ammonia and phosphate. Even growing juveniles excrete most of it. Being eaten by a fish does not keep the nutrients out of the water. :)