I bought several mini Aerotank clones from FT...
As you probably noticed, there are often several "levels" of clones, slight differences in prices too .
Out of 5 bought at different times within six months I had several that were
great,no difference with the REAL Mini Aero's I also had,
but I also got a few (same SKU) that were not so good.. (actually they were even pretty s****y ...I ende up just dumping them)
most common probs=
=the threads are just not smooth and after a while (maybe a a week or so) they finally just "jam up" alltogether despite careful cleaning with alcohol or will screw on "wrong " and get stuck !"
Other frequent glitch, the airflow ring is either too tight or too loose, doesnt stay in place properly...
Yes, all this is just bad finishing, if youre" handy" you can probably polish off these rough edges yourself in afew minutes
With FT, if you read through all the comments on the product page you can usually get a pretty good idea which clones/SKU's are decent and which aren't
However ,compared to the price of an Authentic Mini Aerotank i still found it worthwhile,despite one or two losses due to a couple of duds.
To be honest, ive fallen on a few bad apples at full price too

....