Combating Cyano.

Agreed, and would like to see Ph at around 8.3 and Mg at like 1350. ph and mg aren't causing cyano but your corals would be healthier.

 

These parameters are not ones I would expect if regulars water changes are being done. Weekly water changes alone should give you higher mg, cal, alk and ph numbers then that.

 

Today
Temp - 78.2
Specific Gravity - 1.0215
Nitrite - 0
Nitrate - 0
Phosphate - 0
PH - 7.2
KH - 120
Calcium - 400
Mg - below 760

I don't know whats going on with the PH and Mg. I been dosing with kent Tech M Magnesium for 4 days now. The directions say add 1ml per gallon capacity each day and would raise the Kg at 18.3ppm per day, could be why I havent seen improvement. I put in there about 45ml a day.

 

Everything is proportional. If his salinity low, all other parameters will follow, regardless of water change frequency. So, if he raises his salinity to 1.0264, then everything will be:
parameter *(.0264/.022) (note: always subtract 1 from the specific gravity when doing math. 1 is the reference level of pure water).
So,


KH - 214 ppm *(.0264/.022)= 257
Calcium - 360 ppm = 432
Mg - 760 ppm = 912

I didn't notice the mg, though before. That should be raised, but check again first, mg test kits are complicated and finicky.

 

I been topping off so much fresh water lately I didn't even notice the drop, it use to run about 1.025. Will I am going to put on the elbow length plastic gloves, suck up some junk out of the tank and change about 5 gallons of water and try to raise that a little.

 

Thanks for the help everyone, I sure want to put this right. My Corals look so much better open

 

From the corals I have seen in your pics you should be able to maintain level thru water exchanges only. I don't think you will need to add additives once your parameters are corrected.

 

M2434 glad you joined the thread. Thanks for your input, seriously. Matt

 

Will! I did something I shouldn't have, but it seems to made things better. I raised my SG to 1.026 and my Duncan is showing signs of life and the other 2 Corals looks better as well. I will keep everyone posted and post some new pics of them tomorrow and hope they keep improving. The Cyano! Now thats another story. I can't believe I never noticed my SG so low.

 

Cool :thumb_up: Yeah, sorry, s.g. probably won't help with the cyano, but a healthier tank can handle any ill effects of it better.