Guide to free open source waterfall algae scrubber designs, and also licensable patented and patent-pending waterfall algae scrubber designs:
Patent number 10,655,095 covers water coming up through bottom of scrubber;
Patent number 11,814,612 covers removable walls of scrubber;
Patent number 12,152,225 covers overflowing trays on top of scrubber, using SLIP (tm) tech filed in 2015 and on sale in 2020 (more info: http://algaescrubber.net/forums/show...-for-licensing )
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