I am using the API test kit. It used to test ok. I'm using live sand. I have a fluval 305 in a 40 gallon tank. I feed the fish pellets, and frozen brine, and arcti-pods
for my mandarins. I have about 40 lbs of live rock. I'm thinking of changing the filter pads instead of rinsing them as well as all the carbon and biomax. I do not use bio balls. I'm thinking I also might clean the filter inside and get all the crud out. I have in the tank 3 mandarins a male and female green mandarin and a female spotted mandarin as well as a coral beauty angel, two clowns, a yellow watchman paired with a tiger pistol shrimp, a cleaner shrimp, sand sifting starfish and numerous nassarius snails and blue and scarlet hermits.