Aquarium Stone

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Can any old ornament or stone be put into an aquarium?

Can any old ornament or stone be put into an aquarium?
I have a few ornaments that are clean, have no glitter or paint on them and would look good in a fish tank, are they safe??
the ornaments are china/pottery

I’ll start with stone: Most rock is fine for the aquarium. Before putting a rock into the aquarium take it while it is dry and put some vinegar on it. If it bubbles the minerals in the rock will dissolve in the aquarium and change your water chemistry.

China/Pottery: Raw fired clay like flowerpots are fine for aquariums. If you soak them for a week or two you can take a drill and add holes or do a variety of things to the flowerpots to suit your fish. You can also get a bunch of them, break them and use the curved pieces with a little bit of the bottom left on them to make caves. China could be anything from a coating that will kill your fish to items that are made for the aquarium. Sorry but some china will kill your fish and some will not. I recommend against useing china that wasn’t made specifically for the aquarium.

Aquarium Assorted Colors Plastic Cylinder Shaped Air Stone 4 Pcs $5.67

Black Gray 6mm Outlet OD Air Bubble Stone for Aquarium Ponds $7.46

2 Pcs 2.8mm Import Dia Fish Tank Aquarium Air Stone Gray $4.68

Aquarium 60 Pcs Clear Pink Plastic Crystal Stone Decor $10.04

Aquarium Assorted Colors Plastic Cylinder Shaped Air Stone 4 Pcs $5.28

Aquarium Decor Heart Shape Plastic Crystal Stone 16 Pcs $5.66

Aquarium Air Pump 2x 4L/min Outlets +Tubing +Air Stone $2.13

Aquarium Air Pump 2x 4L/min Outlets +Tubing +Air Stone $3.45

Aquarium Fish Tank Air Pump 3L/min +Tubing +Air Stone $2.68

Sqaure Base Air Stone Releases Bubble for Fish Tank Aquarium $7.81

Wallmonkeys Peel and Stick Wall Decals - Cameleon - Removable Graphic WallMonkeys wall graphics are printed on the highest quality re-positionable, self-adhesive fabric paper. Each order is printed in-house and on-demand. WallMonkeys uses premium materials & state-of-the-art production technologies. Our white fabric material is superior to vinyl decals. You can literally see and feel the difference. Our wall graphics apply in minutes and won't damage your paint or l...

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