Time for a little update:
I removed one of the frag racks, it became a sore in the eye and limited the swiming space for the clowns.
I cured some Stax rocks that i'm using for the new aquaescape on the big tank and put two pieces in the nano, glued all the zoas and acans to them and the rest of my frags remained in one frag rack, mostly my SPS testers.
During the rearengement the main rock structure collapsed, so i glued and epoxied it in a hurry, a 10 mins task became a whole afternoon of work.
Due to this, i had a nitrate and phosphate spike, but now is under control and levels are OK again.
The SPS testers are doing great, some of them doubled size in a three month window and color and polyp extension seems to be ok too.
The clowns became a mated pair and make symbiosis with a hammer and a feather duster. It seems that they don't miss the BTAs
The numbers after fixing the spike remain constant:
pH 8.1/8.4 (night/Day)
Salinity 1.025
Temp 25.5/26.5 celsius
Ca 400/420
Alk 8.5/9.0 dkh
Mg 1350/1400
Nitrate 5/10 ppm
Phosphate .05/.07 (working with some GFO, before the spike i had less than .03 and with the spike i had .9)
The weekly water change doesnt keep up with my alk consumption, i'm using .5/.7 dkh daily, so i put some kalkwaser on the ATO again and the alk is rock steady in the 8.5/9.0 range, could work better if my evaporation was a steady number, but it works for now.
Also had the chance to adjust my ligth, some friends and i pitched in to buy a Seneye, so we could make PAR and PUR readings on our systems and it was very well spent money, pretty happy with the results!