The Tech Den Posted March 22, 2014 Report Share Posted March 22, 2014 We have entered the stock for Mr Aqua Porous Rings - they show a large surface area and look to be pretty good value - Mr Aqua Porous rings Small available in 1 liter and 5 liters Medium available in 1 liter and 5 liters Link to comment Share on other sites More sharing options...
