hi bros

anyone tried this new type of AquaKoubou filter from Japan?
it power by only airpump and seems much more powerful than normal air bubble filters
C328 selling $2X quite x for a air bubble filter...

http://www.aquakoubou.co.jp/product/...r/fishret.html
https://picclick.com/Aquarium-Air-Dr...211064303.html
nstructions in japanese lolx
don't understand...
http://www.rva.jp/shop/aquakoubou/7.htm

hope to get some reviews before buying.
thanks