Algam Lighting ECO 4% Foam Fluid is a concentrate to be diluted to obtain a professional quality foam in compliance with all current standards. 1 litre of concentrate to 24 litres of water. Algam Lighting fluids are manufactured in France according to an extremely strict process, in compliance with all the legal standards for these products. Reliable and efficient, Algam Lighting fluids are compatible with most machines on the market.