entry #9:
End of week Six. No changes in carbon dosing, or air pump volume. I did change the lighting, plugging in the second driver on the surf4 and uncovering about an inch more on the hog3. As expected the loss of the fish dropped the nitrate level. Yesterday was also a tank cleaning day, using a powerhead and filter socks to remove all the tank/rock detritus, further reducing nitrate.
nitrate 7.0ppm, 1.6 on the hach specrtophotometer (has been hovering between 1.5 and 1.9 for several weeks.)
po4 .02ppm on the same meter
I have not scrubbed either scrubber with a toothbrush. They are as they were seen in last weeks photos, little change.