They are awesome. I have lots of them. On smaller tanks like 20gal or so they cant be beat. Floss polishes water beautifully. They run circles around tiny little HOB power filters. Air lifts move a surprising amount of water. A box filter with biomax and floss will outperform almost any economy filter for a small tank.
They went by the way side because they are ugly, but more importantly they last forever. They cost nothing to buy or mantain. Nobody can sell you custom overpriced media or cartridges. The industry is driven by bells and whistles, local shops know whats up.. and choose to maximize profits, reduce overhead, while providing adequate filtration for dozens of tanks, with little effort for maintenance.
Sent from my SCH-R950 using MonsterAquariaNetwork App