Seachem Filter Sock Size:7X16 In each variety the males

In each variety the males and females are both colored the same but those from the northern part of their range have lighter

Males may be distinguished from females by their more-elongated first dorsal spine

It is normal for the dry sensor to have a greenish hue

The Arothron Dog Face Puffer

or classroom and perfect for hobbyists and beginners alike

Seachem Filter Sock Size:7X16 In each variety the malesBy catching and removing suspended dirt, debris and detritus, dissolved organics, nitrates, and phosphates will not be able to accumulate and build up harmful levels in the tank. The welded seams of the sock and plastic collar fits most standard sump fittings, making installation a breeze and ensuring a long, effective lifespan for the filter sock itself.