My new tank will be low-ish tech. It's deep (2'6"), lighting will initially be about 1.5 W/gal and It may eventually have preasurised CO2. (These are decisions that are, for the moment, too late to change.) My goal for a relatively low maintainence tank and I'd rather not be replacing substrate in a year when nutrients have run out. And I'd rather not have to go through high volume water changes that seem to be needed for EI. From my reading it sounds like akadama may be a good bet if I use decent fertilisers. But is it good for a long term set-up?