For the skimmer:
please take my advise and drill a hole in the bottom of the collection cup, hook an airline to it and let it drip into a larger container. it is very hard to get it perfect and if you mess with it and think its right and its not...
if will overflow everywhere, it has saved me 100 times and Ive only had the skimmer for 2 months. I have a 125 model that already has the drain in it.