Hello. I have a 180l tank(around 50g), its fully cycled and has been running for 8 months. NH4,NO2,NO3 are all 0. The temperature is 27°. The water is very soft, 3-5°. I keep two angels, 2 blue gouramies, 2 apistogramma agassisi fire red, 2 panda garra, and 3 bristelnose plecos. The ph of the tank is 7.5 and I know that most of my spices prefer lower ph. My tap water has a ph of 7.8-8. Should I try and lower the ph? The fish are all very healthy and eating properly, the blue gouramis are successfully breeding in the tank (I take the fry out). I would also like to get some breeding from the plecos and apistogramma. Should I lower the ph? Will this impact the gourmi breeding? Thank