RUKDA is proud to supply the highest quality products on the aquarium decor market, supported by excellent customer service. Excellent for Aquascaping. These stones are pH neutral and will not DETERIORATE water in your Aquarium. These stones are Sacramento Green in colour. They can be glued together with Aquarium-safe glue to create caves, cliffs, habitat rock formation and mountain-ranges for fish and plants. They are safe to use in your aquarium and it will not deteriorate in weather like resin does. PERFECT for Aquariums and Fish Tanks, they are pH neutral, so SAFE for any aquarium. COLOR-These stones are naturally Sacramento Green. Our stones/rocks are precisely Hand-picked, Washed, Inspected and also Hand-packed to arrive at your door-place safely. RUKDA Rock is both a soil and a rock type rich in iron and aluminium and is commonly considered to have formed in hot and wet tropical areas.