Looking for some advice please. I’m having issues keeping my ph up. I have a brs co2 scrubber. I switched to medical grade media to see if that helps. I also ran a line outside for fresh air. I have no more that 10 feet of tubing going to everything. I can’t get it above 7.7-7.8. I have a cheap coralife skimmer, could this be the problem? Do I need a better skimmer that flows more air? 54 gallon corner aquarium with an Eshopps RS-75 sump. Should I start looking at other options such as Kalkwasser?