My test kits always test my water as perfect. I use the liquid ones, maybe by API? I usually test my water right before and right after my weekly 50% WCs. My ammonia, nitrites and nitrates are always zero on my established tanks before and after the WC. My Ph is always 7.6-7.8 This seems impossible to me. Could there be something wrong with the test chemicals or am I just the Queen of clean tanks???
p.s I've also tested the water right out of the tap too. Same results!

p.s I've also tested the water right out of the tap too. Same results!