OK here we go, you will need 6 pieces of 1/8" glass cut to 2 sizes. The tall pieces should be 10.5" tall, as wide as the inside of the tank. The short pieces should be 6" tall, again as wide as the inside of the tank. You want all edges of the glass seamed, this is basically just removing the sharp edges from the galss to prevent you from cutting yourself. Don't forgt to tell the glass shop to do this or you WILL cut yourself up every time you work with it. It might be helpfull to bring the tank to the glass shop so they get the width right. You will need to cut a notch in the silicone along the bottom of the tank to get the pieces that reach the bottom of the tank to fit right. These pieces get siliconed along both sides and the bottom, making sure to fill in the notches you cut out. The other pieces get siliconed on just the sides. It is easiest to have the tank on its side to silicone the pieces in that don't reach the bottom. For the pieces that do reach the bottom, silicone them with the tank in it's normal position
Spacing of the baffles,
A-7.5"
B,C,E and F- 2" (these can be smaller, but it makes it very hard to get your hands in between them when Siliconing them in place)
G-5"
D- approx.9" (I only gave you an approximate size as you will work from the ends in and what it winds up being is what it is)
The pieces that don't reach to the bottom of the tank are 1" off the bottom. The 2nd piece from the left will go right up to the bottom of the top frame. this might give you more than a 1" space at the bottom, this is not a problem)
Mark the outside of the glass with a grease pencil or tape to show you where to place the glass.
I've found it easiest to silicone 2 pieces at a time, Silicone the outer 2 pieces first and work your way in.
Before siliconing in the pieces place your pump and skimmer in to make sure they fit aAccording to what you told me, they should, but better to know before the glass is in place.
If I missed anything or there is something you don't understand, just post, I will look out for this for a few days. If you won't be getting to this and need to contact me,you could post your e-mail, and I will get in contact you, you could then edit your post and remove your e-mail. Sorry but I refuse to post my e-mail Addy on a public forum.
Good luck with it.
For anyone reading this, this Sump/Fuge is made from a 20 long. 30"x12"x12"