water from my tap is
ph 7,
kh 0-1,
gh 3-4, tank
kh and
gh was at 16-20 and
ph 8. When I did water changes I got a thick white film on the glass at the water line. it came off with the magnet cleaner, but came right back. Looked like water spots all over, had to finally get rid of it with a razor blade. I thought it may be silicates, or hardness, from the sand (playsand). I cant find anything else in my tank that was raising the hardness. I removed 80 percent of the sand, and now the
gh and
kh took a dive. While I am still injecting co2, why hasnt my
ph dropped? The test kits have been replaced recently. What should I be keeping
kh and
gh levels at? I have had a very thin film of algea growing on older plant leaves, I have changed every peram except hardness to get rid of it , it just doesnt go away. I dont want to use any chemicals, I want to keep it "all natural" Water clarity is excellent, plants are growing, just not growing like crazy. co2 comes out of my reactor, and just seems like its not being absorbed, I felt like the high
kh and
gh was somehow buffering the co2 absorbtion.