This is double fired ceramic and it is safe for aquarium use.
These shelters are made of clay for aquariums. Underwater hiding places are often surprise by their unusual forms and admire with their beauty. These shelters will decorate your aquarium and will make happy your little fishes; also, they can hide from big ones, if there is no another predator.

I'm using Armenian clay mix with Spain clay. All my works passing two time burning under temperature 1000 Celsius, in temperature 500 Celsius all organic thing already buring out ( so it cant change ph in your water). Second part is glazing, glazes are hi temperature colors they are becoming liquid in temperature 950-1000 Celsius and then getting look that you see, they are close with structure with glass. Else of it all my glazes is food safe.
So be sure that pH in your water cant be changed when using my works.

Measurement: approximate

Height 10cm , 3.94 inch
Diameter 12 cm x 10.5 cm, 4.72 inch x 413 inch

Approximate diameter of big holes 8.5 cm x 8.3 cm, (3.3 inch - 3.27 inch)

Thank you for shopping at NarineHandmade.
If you have any questions, please contact me!
Sincerely,
Nana