Liam I want to see that article too, I didn't think it was possible.
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Those tanks are cool but they all look like high tech tanks, it would take probably a number of months for a low tech to grow as thick as that unless you planted lots and lots of plants to start with.
My loach tank has about 11 watts of light from a clip on aquarium light that covers the tank from front to back rather than it's length, it's on 6 hours a day with only a short time of sunset light late in the day. The plants are slow growing (except anubias, puts out lots of new leaves) and there are no stem plants (only crypts, twisted val, anubias nana), but there is not a spot of algae. When the room lights are on the lighting looks like a shady nook in the forest compared to the brightness of those photos (looks brighter if the room lights are off).
The CPD tank seems bright with an 8 watt bulb that runs the length of the tank and is also on for about 6 hours. That one has various algae that comes and goes slowly enough for me to catch and kill or remove and the plants grow faster in there than the other one. I had riccia floating in that tank originally and it did very well for a while, grew very fast and then got a light brown slimey algae that incidentally didn't grow in others' tanks when I sold some, but it blocked the light and some of the plants underneath suffered. I tried plastering the riccia to a rock with plastic netting but I wasn't patient enough to wait for it to grow and the netting looked un-pretty. The crypts in there did really well (till I disturbed them :facepalm: ) and the swordplant and twisted val is also taking off now. Have now added some aponogeton undulatus which looks great, really green. Supasi also grew that in his low tech tank that you'll find in the search.
As Jennifer instructed me ( :sage: ), for low tech you have to have little or no ferts, short light period, but probably any light fitting/brightness will do when you control it time-wise. In the beginning you'd have to start out with say 6 hours and see how it went for a couple of months, if no algae you could increase it and so on. To match it you have to get plants that don't need high light requirements, but saying that many will still do alright if you are prepared to wait for growth. I have balansae crypt doing slowly but well that is supposed to like high light. I never tried glosso or many of the stem plants for those reasons.
In short - if you want the lush look with low maintenance and low tech then get lots of plants to start with so you don't have to wait for the growth.
Black background will be fine if you get a light fitting that runs the length of the tank so it's lit from end to end. My loach background is blue like the CPD tank but in the corners it's so dark it's almost navy. You need to come and visit Auckland and see my tanks!