Hi, I am starting up a new tank (Aqua one 400). Which is a reasonably large footprint concidering the prices of 9L of substrate is around £30! Does anyone have any sugestions as to how I can build up a rather good thick base of substrate without having to rinse my bank account! i have seen a substrate called Manado, which is would be happy to use. but does it offer a good enough nutrient base to grow a nice HM carpet or Monte Carlo. Buying power sand is just out of the question due to price, and I dont really want to go down the dirt route. Would it be a case of buying a certain type of fertaliser that i put in the bottom and that is sufficient along with Manado? or can I use a cheap substrate and just cap it with a 2" layer of a good aquascaping, nutrient rich carpet? I have powerful LED lighting that is dimmable, and I plan on buying a pressurised CO2 system once the dry start has been carried out. Thanks in advace.