Aquarium Safe Rocks • Best Types for Tank Decoration
Nov 11, 2020 · These rocks are inert and won''t alter the pH or water hardness. Slate is especially useful in freshwater aquariums to build ledges and cliffs. 2. Lava rock. Volcanic rock, also known as lava rock, is a popular aquascaping material for aquariums. Lava rock forms when gasses in magma begin to solidify and harden.