Today was WC day, and I figured I’d run the full gamut of tests while I was at it. I’ve been battling a bit of cyano on the sand bed. Nothing major but enough to be unsightly. After testing, I found my Alk and calcium to be a bit high at 8.0 and 485 respectively. I’ll dial that back down to 7.3-7.7 and 450. I had a consumption spike last week, and I guess I over compensated on the adjustments. The interesting results were NO3 and PO4, which were both zero. Thus explaining the paler colors (not much but ever so slightly) and the bit of cyano.
So, I took out the bag of Chemi-Pure Blue and GFO in the sump. I’ll kick up coral and fish feeding a bit. I think the change to the refugium light, and the subsequent explosion in chaeto growth, just sucked all the nutrients out of the water column.
Also noticed a random spot of STN in the middle of one of the branches on my red dragon. I’m hoping it’s due to me chipping away at my RR Nauti-Spiral the other day. Little chunks and slime got spit throughout the tank. So I’m hoping the STN is just due to a piece landing on the red dragon.
Lastly, magnesium came in at 1500 mg/L. Where do you guys keep yours at? I’ve noticed much better coralline at this level, and it appears the turf algae I had on my live rock is melting away. No impact on the bubble algae though ?
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