Thankyou everyone for your comments. Reading what people had to say has given me hours of rethinking
I've finally settled on a design for the sump, taking into account what people have said here and my own research, as well as speaking to the guys at Aquotix about their system.
Here is the design I've gone with.
I will be using coarse sponge and filter floss in the first section, 50lt of Hel-X fluidised in the second section and 2 blocks of MarinePure in the final section for denitrification (hopefully).
I am planning on running a Laguna Max-Flo Power Jet 16500lph which will give me around 12000lph @ 2m head.
Air for the fluidised bed plus airstones intank will be from a PondMax HK-80L pump.
Heating duties will be handled by an Aquazonic Titan G2 1500w heater.
Additional flow intank will be provided by a Tunze 6305 and 6105 running on a Tunze 7095 Multicontroller.
Lighting at this stage will be 3 x 4ft Ista LED units.
Plumbing is 2 x 40mm Standpipes to the sump and a 32mm return from the pump. I'll also be putting in a 25mm drain to make waterchanges easier.
It's all taken a bit longer than hoped to figure out and get organised, but the end is in sight.
If anyone has any further suggestions I'd love to hear them.
Cheers guys.
Trav
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