Well sorry about your frustrations!!!!!!!!!!Power heads always seem to be the problems for people keeping them attached it seems......Tunze is about the only I know of that has come out with a sure fire way to keep them in place, but with their products you have a hefty price tag, but ohhhhhh are they sweet!!!!!!!!!
As far as pumps they can be finicky at times....What kind of pump or pumps are you using? A big key it seems is to do your homework, research and more homework and ask alot of questions from people using the product and if possible see it first hand before you make a purchase...........
Skimmers well!!!!!!!! a whole different ball game.....Yes it does seem they all claim to be able to handle anything and alot has to do with the price you pay for the skimmers as well......EuroReef is a very good skimmer and has it's problems just like the rest, but their customer service isn't the greatest. They use top quality materials and their "big" name and you pay the price for it all....GEO on the other hand is top quality material used good quality and customer service is excellent, and price is reasonable as well.....Then you have ASM a smaller base company with a big following as well, but not the huge overhead as others, skimmers are good as well, but use lesser grade material, and they do overrate their skimmers and again if homework is done you can find the one that works for your situation......Material quality is PVC, but who cares because it's in the sump and as long as it works how cares other than bragging rights about your skimmer brand.......The price is excellent and customer service is good........You could buy a Deltec and I don't think you'll find many who didn't like it or didn't perform as expected, but with the name and European design you'll give your arm and left *ut for one, but very nice......
Test kits can be tricky to read and alot of people like Salifert....In my area you won't find them unless you get them online and I prefer LaMotte, but some of theirs can be hard to read at times, but comes with the hobby I guess
Share some specific info on equipment brands you've been using with us