RTN.....why?

[machodik]

Dear All,

After I successfully stop the STN of my Acros , now it's RTN , why?

My water parameter:
Kh - 8.3 (Salifert )
Ca - 480
Mg - 1410
No3 - 0
Po4- 0.13
Sp. Gr. - 1.026
Temp: 26 degree centrigate

Will it be the Biopellet the culprit ? I heard some people advise me to remove my Biopellet but I have been struggling to lower my nutrient in the past and I only found Biopellet to be efficient in bringing my nutrient to the lowest.

Appreciate for your kind advises and comment

Cheers,

MD

 

[toothman]

biopellets tend to reduce phosphate until the nitrate is used up, or reads zero, as in your tank. My sps tank runs better when nitrate is less than 2 but greater than 0. Any carbon dosing can more easily cause rtn/stn.

 

[machodik]

Thanks Toothman for your reply with comment.

I was struggling whether I have to remove my Biopellet reactor that I run for quite a while and I love its performance in reducing No3 and Po4 of my tank that in the past prior to the set up of my biopellet my No3 was as high as 20 ppm and my Po4 was 0.25 ppm. that is why it took me a long while before recently going to SPS.

For sure if I removed my biopellet , it will get back to the previous level and that also affect SPS as well, this is what I am so much bothering now.

I wonder any other SPS expert can share their experiences and let us know if you still running biopellet or not. I beleived many newbie like me also wanted to know.

cheers,


MD

 

[doctorwhoreefer]

I experienced rtn/stn for awhile when switching to carbon dosing. The cure all? I started to broadcast feed plankton everyday.

I'm running .05-.15 phosphates and my corals have NEVER looked better. (nitrates run 1-10ppm)
I think the hobby needs to move passed the ideal that tanks need zero phosphate and nitrate. I ONLY ever had problems with coral health when po4 and no3 were zero.

I will say though, be sure to adjust the effluent on the reactor a little everyday until its close to a trickle.
If you drop the nutrients too fast rtn/stn will occur.

Do you use a recirculating reactor as well? That's a must.

 

[itche_scratche]

I experience stn while i ran biopellet. The big issue about biopellet is to make sure they are all tumbling. If they not your coral will have issue.

 

[Mylesweaver]

Feed!!! Feed amino acids and zooplankton