Nori nutrition question

[dpfriedman]

Does anyone know if sheets of nori contain any phosphates?
I feed my tangs once a day with
Julian Sprung's SeaVeggies®
Green Seaweed
And this is all I have found.

Julian Sprung’s Sea Veggies -Whole Plant Green Seaweed Porphyra yezoensis
Guaranteed Analysis
Min. Protein 40% Min. Fat 2% Max Fiber 4% Carbohydrate 43% Moisture 8%

Trying to find out if feeding my tangs twice a day would be bad?

 

[ScubaFish802]

All foods contain phosphate.

Tangs should have nori available as often as possible from my understanding.