I'm after a 500 litre tank; 600 is fine, I'll just not fill it up:http://www.ebay.co.uk/itm/IBC-TANKS-VERY-RARE-600-LITRES-/111059861695?pt=UK_BOI_FarmingEquipment_RL&hash=item19dbaf00bfI can baffle it with drainage hose.I quite like the space saving, since it takes up less floor space.They also sell them local to me.
I am sure Ionics used to fit them years and years ago, but changed to baffled tanks for safety reasons.