tang poo is staying in suspension in my dt,looks nasty.i use to feed 1 strip of nori a day with no problem.then this week i started feeding 2 strips,mostly because i read that my vegatarian tang should have food available all the time.its still growing so i felt like i could feed more.should i go back to 1 strip or try something else. i have 2 returns and lots of flow.i feed the other fish 2 x a day,which he greedily munches on too.