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Check thoroughly to see whether there is sufficient contact between the glue layers if the surface is porous
and thorough cleaning
Approximate Dimensions: L18cm x W8cm x H11cm
-Oxygen in the water
NT Labs Marine Multi Test Kit Valve Check thoroughly to see whetherMarine Multi Test comprises everything you need to carry out 155 tests (combined) of the 4 key water parameters to keeping a healthy marine aquarium: ammonia nitrite nitrate & pH. All tests use liquid reagents for improved accuracy. Full instructions are included detailing optimum levels and suggestions for correction along with an integrated test tube rack. Simply follow the easy to read pictorial instructions and compare the test tube to the colour