That's a nice combo, same as I run. I ran the 400 last winter and switched to the 250 for the summer. I know at 12", that 400 Radium combo will put 1600 par at the surface. With the 250 at the same height you should get about 1200. Go slow...
So that halide was just temporary. I ended up buying an 8-bulb ATI Sunpower. Should have it up late next week.
I also bought this new acrylic ATO reservoir. It has an access door on top thats roughly 4" x4". The reactor holds 5 gallons and has a viewing window on the front to see the water level, although you need good lighting to see inside. There is also a 1.5"-2" round hole in the back for the tubing and pump to access the reservoir. Quality build.
You can see my old 1.5-1.75 gallon reservoir in the back of pic 1. I got tired of continually filling it up.
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