1) Thickness 6mm all round include base!
Qn: Can the thickness, especially the base, take the weight? It's only 6mm thick.
ANS : Can but you only can have max 15KG LR. And try not to put
on the wall of the glass
2) Dymax 2000L/hr return pump.
Qn: Is it sufficient?
ANS : Yes more then enough
3) Two drilled holes. One is 2.2cm in diameter the other is 2.6cm.
Qn: Which one is for inflow & return? Heard the bigger one should use it for inflow to sump. Is this true?
ANS : Bigger hole is water flow to the sump.
4) The cuff attached to the base of the tank. Do you guys advise to add a gasket ( the dougnut like rubber use in water tap) between the joints, then glue it and add silicon? Or are there alternative method.
ANS : rubber will get hard over time. Best is use silicon.
Thank you so much if any experts here can assist me on these.
GOOD LUCK and Welcome to Reef World