Nutrient/growth

[Bryan16b]

My first time at this lol
I have a 72g reef.torches,hammer,muhrooms,gsp. .mg 1300,cal 450,kh 9,ph 8/sal .023
I have been reading 0 phos and no4 for quite ome time.I have no gha in my tank only some grape grapula in my sump(which is doing great)and some in my display.Is it possale the grape crapula i using it all up.
Question should I consider carefully adding some no4 and phos.Corals have very small growth and dull colors

ps 6 mnth ago I had a icp tet done and wa low on ome other trace element a well.

 

[Stef777]

Phos is very important to have in tanks. It is much, much more devastating if you have none rather than too much.

 

[CHSUB]

Do you have fish? Also you could feed the coral directly and let the corals feed the zooxanthellae algae its waste. That is how it’s done in the ocean and how I do it. I would rather not directly feed algae.

 

[Bryan16b]

yes have about 6 and some inverts i can feed directly yes

 

[CHSUB]

yes have about 6 and some inverts i can feed directly yes

If you feed your fish and corals nutrients levels in glass boxes will very likely be higher than adequate despite what your hobby test kits show. I have not had readable no3 in a sw fish tank since I stop using undergravel filters in the 1980’s. Here is a video; feed your corals too and they will be better than ‘Good”…

 

[Randy Holmes-Farley Verified Community Expert]

I’d start by feeding more, and if that isn’t enough, dose N and P.