Hi chenzo, I used to have an upflow algae scrubber but I thought this idea was way better as there is no equipment in my tank.
You say you would like a hob
scrubber and an upflow scrubber is basically a hob
scrubber and is easily DIY'ed ill send you a link.
Most people use the thin plastic trays that come in microwave dinners, cross stitch canvas as the screen, a air pump and led
's or energy saving bulbs that are 2700k. Some people have had great results with these and can be that powerful it replaces all other filter media and equipment, some people have even ditched their skimmers an just run a scrubber itself