Thanks for the feedback Pie and Brian...
Might give the taxafolia a miss...will be too hard to 'roundup' it in the tank!
So I thought growing 'plants' would be better than having algae orgies turning my water 'white' - is letting just the additional biological filter do its thing better still?
I thought I had a decent size tank (90g) until finding Pie's refugium is twice as big!
Who would ever want a maintenance free SW tank? Would give us no excuse to play with it!
What IS the divorce rate amongst SW tankers?