ATS continued
And finally, today 11/9, at the end of week 4/beginning of week 5
Front
Back
Cross section
Now I've never ran a refugium before, but I can't imagine that you could produce this many ounces of excess plant material in one week. All of what you see above (or 95% at least) goes down the drain weekly. I bet if I drained and weighed it, it would be in the range of 6-12 ounces of algae per week at this point - and it's not working at 100% efficiency. 6-8 ounces of Chaeto would be a 1 gallon ziplock bag stuffed full. This is massive filtration capability, 100% natural, no fancy mechanical equipment, and while it grow and removes the bad stuff, it adds the good stuff.
I cleaned the screen but didn't take a pic...swapped bulbs and didn't have time after that.
Test results from 11/8
Nitrate 0 (was there for several months before pulling skimmer, raised up to 0.5ppm after pulling skimmer, but about 4 days after starting the ATS they dropped to 0.05 and at day 8 and on they've been 0)
Phosphate 0.1-0.25 (were as high as 2.0 in past before I took it over 1 yr ago, so it will take a while to leech them all out of the rock, I've never seen them at undetectable levels even while running RowaPHOS)
Another interesting thing is the mushrooms are splitting. I didn't see any evidence of this happening in the past year at all, but in the last month 3 of the fuzzy mushrooms have all of the sudden split, and it happened fast. I post that pic earlier in this thread and now that one is definitely split and 2 others have started.
Problems to overcome right now are #1 flow rate across screen needs to double (yellow growth is due to low-flow - screen should be all green), #2 replace slot tube with no-cross-cuts tube (my misunderstanding), #3 I'm going to modify the design of the acrylic box.
By the way, I found out that Acrylic is actually porous, which is why the lids and other parts that aren't cross-braced tend to bow over time. They absorb water and expand on the wet side.