Substrate clumping

[marie]

Originally Posted by i have crabs

is it loose clumping or hard clumping? loose clumping is usually from sticky biofilms from excess dissolved organics,hard clumps is usually calcium carbonate binding

Another good way to tell why its clumping is to put the clump into some bleach water, if it falls apart its excessive organics if vinegar is the only thing that breaks it apart its calcium