Hey Ward, tank is looking good and starting to behave. Nice to see it's coming along quickly. Very nice.
The Hanna checkers have a +/- .04 margin of error so your results are not surprising.
Thanks Matt. I was not too worried about the variance at the time. I forgot about the margin of error but felt the change was too small to worry about.
The tank and I had a little test. Sue and I went down East to New Brunswick to celebrate her folks 60th wedding anniversary. We left last Thursday morning and returned last night(Mon). This left the tank unattended for 5 days. I am very happy to say that all corals are looking good and there are no detrimental affects that I have seen.
I used the Eheim autofeeder and gave the fish a shot of pellets 4 times a day. I lost no fish and the clean up crew looks pretty good. I have a lot of snails so not sure if I lost any.
We got back late yesterday afternoon and I tested the parameters last night. The alk had dropped to 123 ppm (6.88 dKh) so I added a little baking soda (5 tsp). The main issue with the CARX is the use of a small pump (MJ600) for supply and the use of a needle wheel to regulate the effluent stream. I have experienced some plugging of the effluent line and consequently some variable effluent volumes. I plan to get a peristalic pump but until then I will use the MJ600 and a needle valve to provide a continuous flow. I will just have to make some adjustments on the fly.
I did have an algae film on the glass when I got home. It was not too heavy, so I was quite happy given the 5 days absence. I tested nitrates and they were basically zero (no colour using salifert). My phosphates were .09+ which is higher than the .05 that I want. I am not surprised because I expected the Rowaphos to exhaust soon.
I replaced the Rowaphos today and will continue to monitor the phosphates.
Off topic: It was a wonderful weekend. My In-laws are pushing their 80's plus, and they were smiling the whole weekend. The wholw family was there plus many friends. My father-in-law drives me nuts, only because he talks way more than me. [emoji16] My mother-in-law is a sweetheart and I love her almost as much as my own Mom. I came to realize a long time ago that their daughter's welfare is the most important thing to them, and that my role is to be the best husband I can be. I must be doing something right, because she is still with me after 28 years and the in-laws still accept me. End of sentimental segment.