I take back my comments, i dont use easybalance anymore, i do regular water changes.
Why did i change?
I realised a 40 uk gallon is capable of being stable most of the time, my fish have not died, and they acted differently when they had a water change (piranhas).
I think this product could be good, but is way off yet. It makes your tank stable as hell, nothing can topple it, the tank water looks polished too, everything looks so clean and bright, however it doesnt keep the fish happy after 6 months.
Maybe use as a backup if you cant do a change, like a 3 week holiday away for example, get a neighbour to tip this stuff in to reduce nitrates and give back trace eliments, but as a long term solution it wont keep your fish happy or want them to breed. It will do the key things like reduce all nitrates and aid plant growth.
Put it this way, when i stopped using it in place of water changes the big apple snail went on a mad production spree having babies everywhere, and the piranhas began eating everything in their site (including the dither fish) so they were back on form again
Use it as a backup measure, or in case of a nitrate/nitrite spike, or even for the plants and trace element benefit but keep changin the water because theres no synthetic substitute