Peculiarly High Ph During Fishless Cycle With Ada Amazonia II

[Kareem Monzer]

Hey guys,

I'm approaching the end of my cycle and have been experiencing peculiarly high pH test results in my 125L (33gal) tank. I'm getting pH levels of about 7.4-7.6. Now I know that that is not even considered that high, but the strange thing is that my first layer of substrate is ADA Power Sand Special and my second layer is ADA Amazonia II, which is famously known to make the water acidic. I do daily 30% water changes and my tank is mid-heavily planted with rocks and driftwood as you can see in the picture below. My filter has a flow rate of 600l/hr, which gives a turnover of 4.8x/hr.

My remaining water parameters are:
Ammonia 0-0.25ppm
Nitrites: 0-0.25ppm
Nitrates: 5-10ppm

I dose Seachem Prime, Stability, Excel, Flourish and Potassium.

I'm a little worried because the majority of fish that I am planning on putting in my tank when its finished cycling prefer a pH between 6 and 7.

 

[goatnad]

Its probably your rocks. They look to be seiryu stone which can raise pH.