hi again could some one help me what is best for my discus ro water or hma my water ph is 7 to 7.5 and not doing well at moment all water stats are ok tested to day at lfs but ph is a bit high i put 125 ltrs of ro water in to try get ph down and need help should i carry on with ro or get hma unit a bit lost and need help would it be better getting ro hma unit and can you yust use one off them to get the water stats better ph 7 t0 7.5 / nitrate 5/ nitrite 0 / ammonia 0 my tank is 6x2x2