Are these externals any good? having issues finding second hand fluvals for cheap or any second hand external really, i would run it alongside my juwel internal bioflow 6/
Cant find many reviews of them so i assume no bad news is good news?
well I've had one for, over three years. as a filter, i can't fault it. its is a bit of a sod to work on though. the lid, takes some getting off, the media is all in one basket, making it more fiddly when cleaning. worst of all, many of the "attachments"(taps connectors) are a bit fragile. even so, purly for its filtration, i would buy one again.
I can't help you with the lid. you just gota pull! you get used to the basket (and not only Hydor prime have this problem. Eheim, being another). as for the attachments. IF they go, they are cheap to replace, and i have found, easy to source.
its "real" flow rate, is around, 5-600lph. making it fine, on its own, for a 125 litre tank. I, personally, would suggest you junk the juwel item. the space it creates is, more, useful then its filtration ability's.