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Sorry I've missed your comment.
No it is not dead silent.
My ATS is almost 40 cm high so there is some dripping sound.

Interesting. I have less growth where I have the blue led 440nm. See the brownish area (lower middle) at my net. But maybe its to close so it burns the algae?
I´m superpleased with the growth I...

Glad you liked it. I f I would have built it again I would have built it smaller and thinner. My measurements now are 15,75" x 15,75" x 5,51"

Harvest 5 weeks after start. No3 have gone from 25-15 and I'm rally pleased.
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My latest DIY tweak. To get an even and smooth waterflow over the net. I put a 32mm tube over a 20mm tube, it made a snug fit :-) with the 20mm end cap and the 90 degree bend and it automatically...

4 weeks growth. I'm really pleased with the result so far. No3 have started to sink as well. When should I clean the net for the first time? Are there any guidelines?
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3 weeks growth. What are your experience? Is this a normal algae development?
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You can see the difference now already :-) Do you see the brownish area in the lower middle. Perhaps a bad call?

I wanted a small and slim ATS for my Percula 120. I used 2mm aluminium to build a box that also functions as an passive cooler for the leds. Then I´ve put a acrylic box inside that one. Here are som...