Thanks - Good to hear from some local Oz Guys...
OK - So why is the Bio Tower Not needed?
My Sump has 2 dividers (3 chambers)
Bio Tower in the first one (will pull out)
Then a dead sand bed (should I remove this??)
Then the chamber where I have my Drain Pump, Heater, and Probe..
So Laterite (how deep?) under gravel = Cool!
With My return from the sump - should it return high up in the tank - Currently, Having bean my marine tank, it comes in to the tank, then drops down to the bottom and exits at substrate level (it had live rock over it once)
I few pics of my Marine setup are here - http://picasaweb.google.com.au/adriaanvh/AquariumPics
and you will be able to see the sump room too - But now changing to the planted tank..
Can I use ANY drift wood in the tank?