Make your own, it's cheaper, especially on anything bigger than 10 gallons that would need multiple nutrafin systems. I ran my 180 litre planted on DIY yeast for a while, just used 2 plastic 2 litre fizzy drinks bottles. Drilled a hole in each cap slightly smaller than the diameter of some silicon airline, then siliconed a small lenth of airline into each hole, each with a check valve attached. Then I attached both of these to 2-1 airline valve set (back to front, so that the bottles were connected to the outputs). I then attached a longer length of airline to the output (usually the inlet) and put a lime wood air diffuser (as used in protein skimmers etc in the marine side of the hobby) and put this in my aquarium. I then staggered filling the bottles, using the standard yeast mix of about 1 tspn of bread machine or wine making yeast, about 800g of sugar and top up with water to a few inches below the neck of the bottle (leave space for the bubble up you get when the mixture first kicks in, else you end up with yeast in your aquarium). Some folks put a bubble counter inline as well to protect against any yeast mixture getting into their tanks.
It's easy to do, cheap and fairly effective.
Ade
/www.drsfostersmith.com/product/prod...amp;pcatid=7324 which out of the florite and eco complete would you recomend, or would you recomend something different?
