I do not have data on silica, will have to check the cost of the reagents. I did not purchase the silica test reagents because I thought I was not important. However, I noticed a lot of brown coatings on the aquarium's sidewalls, presumably due to diatoms. If this were the case, then I do have high silica concentration in my tap water.
Dr. Teh, I misspelled your name. My apologies.
