Cool, thank you. But just thinking, won't the space between lights and algae then also be an issue for corals when tank lights are not directly against top of tank? Obviously closer is better, but how close is close enough. It is fine about the acrylic tube if it doesn't work, have lots of other uses for it, like building a trap for collecting fish off Durban or using it to build a lanthanum chloride reactor.
The problem with double sided tape is then that it is going to be between the LED's and the reactor, so will then also have a reduction in light. The spacers will have to be close to each other else some parts of the strip will also touch the acrylic again. At least I have space now to add another 5 meters of red LED's, as I think red is anyway better for growth than cool white. Will evaluate the chaeto growth and make another plan if it doesn't work like this. Wonder if wrapping aluminium foil around outer tube will help with better light as well.
The problem with double sided tape is then that it is going to be between the LED's and the reactor, so will then also have a reduction in light. The spacers will have to be close to each other else some parts of the strip will also touch the acrylic again. At least I have space now to add another 5 meters of red LED's, as I think red is anyway better for growth than cool white. Will evaluate the chaeto growth and make another plan if it doesn't work like this. Wonder if wrapping aluminium foil around outer tube will help with better light as well.



It is easy to set up a nice looking tank, not so easy to keep it thriving and stable for a year plus.