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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
No chemicals are involved and there is no risk of dangerous overdosing
The denitrification catalyst supplied with the blocks increases the bacteria production within the massive surface area and ideal living conditions on the inside of the blocks
by dissolving and dissociation of water
Equipped with a modern engine with low low consumption
dino-x is intended for use in marine aquariums only
D-D H2Ocean Refractometer With Seawater Calibration Live Sand No chemicals are involved andD D H2Ocean Refractometer is a hand held instrument for the measurement of the TRUE Salinity and Specific Gravity (S. G.) of sea water by refractive index. Easy to read. Has a copper internal body to conduct heat faster than aluminium and plastic. Auto temperature compensation (ATC) ranging from 5 to 30 degrees Celsius. Highly accurate. Easy to calibrate. A new finer scale running from 20 40ppt salinity (SG 1. 015 1. 030)