So I typed out the whole post, put up the pictures and it closed before I had a change to submit it!!
Aw well...Here we go again LOL!! This is my 75gal. Small bioload as I don't like a whole lot. This tank had 4 fish...2 clowns, a yellow tang, and a wrasse. Also, one coral bandit shrimp. Cleaning schedule was the same 10-15% water change per week.
Sump has nothing in it again but water. Same skimmer but outside this time, same phosban reactor and bag of carbon, but as you can see, I have a little light over the center chamber. During cycling I had some cyno growing so I made conditions in the sump more favourable for it to grow there and it did. So everyweek when doing my water change, I would suck out the cyno and let it grow back repeating the process. Eventually when my nitrates went to zero it disappeared which allowed me to remove the light. If you look closely, you cans ee the last chamber was added on. I had a problem with the back siphon coming from the return line when the retrun pump was shut off. I need the extra volume to avoid a spill over so I added that on which was what I had explained earlier to you.
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The tank. Bare bottom again. Two powerheads you see are Tunze streams. One put out 1600 gph full blast and the other 1850 gph on a controller than alternated the speed every few seconds. The nozzle you see up top is a sea swirl attached to my return pump (700 gph) that rotated 180 degrees or so every minute or so. Eventually I added in that over the top closed loop I showed you earlier that added another 950 gph to the tank so I had around 5,000 gph of flow in this tank which was around 70x turnover rate.
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Next was lighting. Dual 250w metal halides. I had to use 5 fans in my canopy to keep the temp down. 3 pulling out hot air and 2 sucking in cool air. Also ended up putting a fan on my sump as well. The first shot shows the intensity of the lighting and notice the color. Those are 20K XM bulbs. Very blue! Eventually switched to 12 K radiums.
This shot shows all the fans marked by the red arrows
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Lastly, eventually I neede piece of mind from the lights so I added in a chiller. Plumbed it through my return line so here's a full shot of it all. This was supposed to be the tank with the corals. This was actually the tank that I got my nitrates down to zero making it possible, but with a baby on the way and needing the space and also less work, I went to the 38al.
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