You'll have to forgive the sarcasm of my last post. My point was that I, as well as plenty of others, have suggested and/or made plenty of what I consider improvements to the basic design of the waterfall algae scrubber since it was originally introduced. So to say that it has remained...
You would need a sump and either feed the scrubber directly from the overflow (ok, as long as you have overflow protection in place) or have a dedicated scrubber feed pump, or tap off the return pump.
I wouldn't put one under the tank without a sump personally. I'm not even sure that you could...
Someone did this several years ago actually, drill holes in a pipe instead of a slot, works OK. Algae grows heavy where the canvas comes together and diverts the flow sideways, but draping black plastic over that part eliminates that issue.
Paul's been running an algae scrubber probably since before I was born. Well maybe not that long. But long. This is just a different method he's trying
I have run 2 tanks for several years with only a scrubber. I would say that it can be done but that strongly depends on the the system - mainly, related to corals you will be keeping IMO.
FO of FOWLR, my opinion is you can go scrubber only.
Skimmer + scrubber is a good combo. One thing to...
That's so weird, just today I was having a conversation with someone about different material for screen, and fabric was brought up. I think cotton would deteriorate eventually but some other kind of fabric might work.
This is not always true for all scrubbers. LED scrubbers in particular, if the fixture produces strong enough light. I know people who run 6 hours/day on 18 off. I don't run any of my personal scrubbers more than 12 hours/day.