Originally Posted by tony maglone

Yeah with Aqua it says that if you set the PH before you put it in the tank you can leave it and it will be ok, where as with Hydro you have to check and reset the PH once it had been in the tank for a while as usual.
I spoke the a man at canna and he said and i do quote " i would not advice the use of Aqua in hard water areas as the PH will be difficult to balance and to much acid will be added over time, Hydro ( hard) has been specifically designed for hard water areas and may well be the better choice" i totally agree, after using them both Hydro is for me obviously its going to differ area to area...