I don't own a master kit...have a bunch of bottles for this and that given to me by friends that left the hobby which I never even used.
Best purchases you can make in this hobby if you are to spend money on things
#1 - ph/tds controller...by far the best purchase I ever made for this hobby
can be controlled by co2, using lights/air pump for oxygenation...whatever method you want to use to achieve results....
#2 - tools/stuff
- silicone...anything saying poisonous or a deadly skull is great stuff. Aquarium safe silicone? lol? it's silicone!...
- lightweight silicone gun...these things get heavy and hurt your fingers when you're trying to push silicone while angling stuff
- silicone smoother/finishing and nozzle extenders. Finger works but it will never look as good.
- hand scrapper/blade. Glass is expensive and it's lots cheaper to get it for free or very low priced from someone throwing it out and that's how you'll clean the stuff on them.
- Glass cutter anything cheap works (don't buy the solid steel fletcher/richard ones) although they're known for many years...they tend to run
anything with a square angled block and with a tube to put cooking/olive oil to aid in the cut works better.
- Thick ruler...min 1/8 thickness. I have yet to find a non-slippery ruler! I just made my own...rubber/cork doesn't work.
dual-sided adhesive from the dollar store on the bottom on both edges...clean some of the glue with a wet-sponge...it will ALWAYS stick xD
- rotary tool...had a few...never had to change from "dremel" so yeah dremel is expensive but doesn't break the tip or locking mechanism or spin weird.
nothing like finishing or smoothing glass with one...a regular drill won't even compare
#3 - prime...gets the job done.
#4 - usb air-pump / phone charger / dual-sponge pump...great backup for a just in case....you just never know and you get to charge the phone/usb stuff while away xD
#5 - root tabs...work great for plants and no unnecessary ferts being added all the time
#6 - lots and lots of filter floss...best thing for filtration... colour changes to dark brown = change it. Simple and easy
#7 - Nothing beats a sump...no humming from pumps...no dripping..0 noise...if you have a sump and it makes noise you didn't make it right
and if someone says they like the sound of the water gushing and dripping while trying to sleep... give them 20 years, they'll change their mind
#8 - strips...you won't need them but it's nice to have just like the air-pump...a "just in case" type of thing
and the advice I give to people in this hobby is simple...
1. never trust someone that has something to gain from you (shops)
2. do your research, on the internet everyone's a scientist. Read, read and read some more..when the specific subject you're researching has been confirmed by multiple sources.
Now look at pro's and cons of it compared to Way A, way B or way C and make an informed decision of what's best for you and your methods/choices/means.