Spray paint in aquarium - The Planted Tank Forum
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post #1 of 9 (permalink) Old 10-31-2020, 06:23 AM Thread Starter
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Spray paint in aquarium

So setting up a new planted tank for my musk turtle already since I was regretting how small my setup was. But I wanted to use my leftover spray foam from the last build to make some rocks. Downside being they are black and I wanted a more "natural" look to them.

I looked at rustoleum and I like the American accents stone texture finish but I have no idea if its safe. Most guides say that plastic spray paints are safe but this ones for wood, metal,glass, "and more" so im worried plastic is not under "more"

Any input would be great, should I clear coat it to be safe? Any alternatives to getting a stone color paint in its place.
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post #2 of 9 (permalink) Old 10-31-2020, 01:25 PM
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I wouldn't do it.
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post #3 of 9 (permalink) Old 10-31-2020, 04:26 PM
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I'm not sure if the solvents in the spray paint will melt the spray foam.

What about coating the still wet spray foam with natural colored sand?

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post #4 of 9 (permalink) Old 10-31-2020, 05:40 PM
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I wont use anything that has petroleum product in it which has toxic solvent and may melt your foam. A safe way Ive done in my shrimp tank is to coat the surface with superglue and dust it with terra cotta powder. It has a natural larva look and I used an electric grinder to powderize a terra cotta pot.
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post #5 of 9 (permalink) Old 10-31-2020, 07:57 PM
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The only paint that I've ever used for in-tank application has been Krylon Fusion.

You can also use clear aquarium sealant on top of the expanded foam rocks and then embed sand/grit if you want to try another method. However, I'm not sure how buoyant the expanded foam is and whether the "rocks" would stay submerged.
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post #6 of 9 (permalink) Old 11-01-2020, 01:16 AM
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Why not cover your foam rocks wish sand before the foam dries? Both are aquarium safe and the technique is commonly used in making aquarium backgrounds. You could embed a real rock inside the fake one to ensure it won't float when you're done.

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post #7 of 9 (permalink) Old 11-01-2020, 03:30 PM Thread Starter
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Quote:
Originally Posted by deeda View Post
I'm not sure if the solvents in the spray paint will melt the spray foam.

What about coating the still wet spray foam with natural colored sand?
Quote:
Originally Posted by Tiger15 View Post
I won’t use anything that has petroleum product in it which has toxic solvent and may melt your foam. A safe way I’ve done in my shrimp tank is to coat the surface with superglue and dust it with terra cotta powder. It has a natural larva look and I used an electric grinder to powderize a terra cotta pot.
Quote:
Originally Posted by Complexity View Post
Why not cover your foam rocks wish sand before the foam dries? Both are aquarium safe and the technique is commonly used in making aquarium backgrounds. You could embed a real rock inside the fake one to ensure it won't float when you're done.
So I've already sprayed some foam with no issue. I had looked up that certain people with reef tanks use both rustoleum and krylon with no issue and I was concerned if that specific kind would be still safe.

The reason I didn't use sand while foam is drying is I shaped the foam once dry with sanding and cutting edges to make a more natural look.

I also know its going to float so I planned on siliconing the pieces in place once finished.
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post #8 of 9 (permalink) Old 11-01-2020, 04:20 PM
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Quote:
Originally Posted by jabrocious View Post
Quote:
Originally Posted by deeda View Post
I'm not sure if the solvents in the spray paint will melt the spray foam.

What about coating the still wet spray foam with natural colored sand?
Quote:
Originally Posted by Tiger15 View Post
I won’t use anything that has petroleum product in it which has toxic solvent and may melt your foam. A safe way I’ve done in my shrimp tank is to coat the surface with superglue and dust it with terra cotta powder. It has a natural larva look and I used an electric grinder to powderize a terra cotta pot.
Quote:
Originally Posted by Complexity View Post
Why not cover your foam rocks wish sand before the foam dries? Both are aquarium safe and the technique is commonly used in making aquarium backgrounds. You could embed a real rock inside the fake one to ensure it won't float when you're done.
So I've already sprayed some foam with no issue. I had looked up that certain people with reef tanks use both rustoleum and krylon with no issue and I was concerned if that specific kind would be still safe.

The reason I didn't use sand while foam is drying is I shaped the foam once dry with sanding and cutting edges to make a more natural look.

I also know its going to float so I planned on siliconing the pieces in place once finished.
Any reason you don't just use real rocks? You can get them for free from the ground and they will look very natural.
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post #9 of 9 (permalink) Old 11-01-2020, 08:08 PM
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Quote:
Originally Posted by minorhero View Post
Any reason you don't just use real rocks? You can get them for free from the ground and they will look very natural.
There are reasons hobbyists prefer fake rock, such as creating 3D background, caves or unusual formation as real rock can be heavy and risky of falling over. So painting over DIY rock to look real is necessary. I don't make fake rock but have a glass crystal crab I painted to look terra cotta red.
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