How is the Twinstar Nano different from the Chihiros alternative which is around 7 times cheaper?
https://www.ebay.co.uk/itm/Algae-Re...m=162478303223&_trksid=p2047675.c100005.m1851
https://www.ebay.co.uk/itm/Algae-Re...m=162478303223&_trksid=p2047675.c100005.m1851