i use the Red Sea Pro Test Kit, instructions state 5ml of water. i tested 3 times and each time i did i got water from the top, the middle and the bottom of the tank. I added some more live rock which is exploding with all these cool stuff but i highly doubt that it could be the new rock as it is only about 4kg of rock. on all 3 occasions i used 1.3ml of titration. 0.01ml = 20ppm. the test kit is well away from expiry date. will take sme water to lfs and have it tested. This is very very confusing and i cant get any advice on lowering except doing a water change. i do not have any Livestock in the tank and no corals apart from a tiny blanket polyp which opened all of its thingys since i got it a month ago. do i neeed to change water or should i leave it for a few days till i do my next change?