thanks everyone. tank spec and maintenance:
70gal juwel tank (not sure if you get these over the pond)
fluval 304 and a large internal filter made by juwel (german)
approx 1.8w/gal 12hrs a day
2x200w heaters tank temp. of 30c
medium planted with swords and vallis(intend to add more varieties)
30gal/day "purity on tap" ro unit. i use 100% ro as i feel adding tap water to raise hardness defeats the object of using ro. loads of heavy metals in this part of the world. buffer back to 70ppm using kent ro right.
ph 6.6
20% water change every 4 days with gravel vac (or sand as i have).
Inhabitants:
4 red turq discus approx. 3 inch
2 wild green discus approx 5-6 inch
7 cardinals
8 panda cories
I feed 2-3 times a day. 4 if not working.
frozen bloodworm
Hikari discus red colour enhancer pellets
Diskusin (again not sure if you get this)
Diskusin Info
and live brineshrimp at least once a week.