Definetly worth the cash. I had they send it to here, in Brazil. Costed me over $50, but still better than cutting the hood.
By the way this skimmer is wonderful too.
Thanks everyone for your input on the StevieT skimmer cup, I'll order one as soon as I finish this post. I don't want to cut into my hood either.
Just bought my nano cube hqi and it will get here on Tuesday. So i have read 20 pages of this thread so far and haven't gotten my answers yet (although im sure they have been answered before but i cant find them.)
So my first question is substrate, I dont know whether to do fine sugar like sand, crushed coral, or go bare bottom, what would be the advantage of each?
my second question is come summertime is a chiller going to be a must? As of right now where the tank is going to sit is about 1 ft to the right of a window that will have a window ac unit in it, is that going to be enough?
Congrats on your new Nano Cube, they are awesome little tanks! It's worth reading through all 3 sections of this thread whenever you find the time, especially for the HQI owners who have been discussing chillers and such for quite some time but I understand it takes a while to get through the whole thing.
As far as substrate goes, you'll likely get a half dozen different answers on this one. This topic has been widely debated in this forum and others. Some swear by bare bottom and from my understanding it is likely one of the best to keep excess nutrients down but most prefer the aesthetics of a sand bed. A DSB is not popular with these tanks as there is already limited volume being a nano. A SSB is quite popular as it looks nice, provides a place for microfauna as mentioned above, and is not going to create "pockets of poison" over time.
As far as the size of the individual grains of substrate, stay away from crushed coral pebbles as detritus will tend to build up between the coarse pieces. Really fine sand or aragonite are likely your best bet.
Now as far as the chiller goes, I can't say for sure since I have the LED version but after having read the entire thread I can say that it seems to be the consensus that a chiller will be needed at some point, especially if you live in a warm climate. Fans can be used for evaporative cooling with some degree of success depending on your climate and if you have an AC unit in your home. A major problem is how well the hood traps the heat in the tank. Also as mentioned above, you could raise the hood to allow more heat to escape. Personally, I think if you have an AC unit in your home, raise the hood (as long as you don't keep fish that like to jump), and throw a fan over the back chamber you would likely be able to get by.
I hope some of this helped. Good luck!