New Project

[Fitzgerald]

Hi All

newbie here, so hope in right place

Long story,but here goes

have 100 gallon in my back garden, tropical and heated to 25%, been running for 2 years
new project is to replace with 800 gallon stainless tank with glass front

the tank is purchased

I dont have room below for a sump

I can drill holes in side

I have at my disposal:

3500 lph external pump
16000 lph external pump

pressurised canister filter for upto 6500 litre tank
50 gallon tank , acrylic 48" tall

elecro 3kw in-line heater

I could do with some advice as to setup & plumbing

bottom drain is not an option

thanks

Steve