Want to Get Low-Density Rocks - Tropical Fish Keeping - Aquarium fish care and resources
  • 1 Post By Mikaila31
LinkBack Thread Tools
post #1 of 6 Old 04-19-2013, 08:40 AM Thread Starter
New Member
Question Want to Get Low-Density Rocks

I have a scheme for a new layout in a 50-gallon tank that will involve rocks (or what look like rocks) mounting almost to the surface (1.5 feet high). I don't want to use "regular" rocks because of their weight. Can you suggest an alternative and where to get them?

LaneLester is offline  
Sponsored Links
post #2 of 6 Old 04-19-2013, 10:41 AM
JDM's Avatar
"regular" rocks are going to be between 2 and 3 times the density of water... sand is in in the same area already. I expect that the bottom of the tank is spec'd to handle a lot more than the load of water so as long as you put a layer of dense foam under the rocks to avoid pressure points you really shouldn't have to worry about the weight... unless you are really filling a large horizontal space as well.

As for lighter rock, something manmade. Lattice rock might be lighter as it is extremely porous but probably isn't the look you are going for.


Total years fish keeping experience: 7 months, can't start counting in years for a while yet.

The shotgun approach to a planted tank with an LED fixture

Small scale nitrogen cycle with a jar, water and fish food; no substrate, filter etc
JDM is offline  
post #3 of 6 Old 04-19-2013, 11:47 AM Thread Starter
New Member
Thanks for giving me some things to think about, Jeff. I don't know what lattice rock is, and Google didn't help me.

What I've seen called lava rock is pretty porous, but I haven't really searched on the web for yet, yet.

I see the Hagen company on Amazon has some good-looking fake rocks, but they're kind of expensive.

LaneLester is offline  
post #4 of 6 Old 04-19-2013, 11:49 AM
Pumice rocks or volcanic rock is technically lightweight because of all the trapped air inside it. It can often even float.
pop likes this.

.... I'm probably drunk.

This is how I lurk

Mikaila31 is offline  
post #5 of 6 Old 04-19-2013, 02:01 PM
MoneyMitch's Avatar
ive used egg crate inside the tank when ive done extensive hardscapes for my Africans, ive yet have a avalanche or stack break a tank... goes for both glass and acrylic.
MoneyMitch is offline  
post #6 of 6 Old 04-28-2013, 04:23 PM
New Member
Alternatives to rocks you can use are driftwood (mopani, malaysian) and unglazed terra cotta tiles.
nolfan is offline  

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wanting low tech, low cost, planted tank Snype2live Beginner Planted Aquarium 40 12-29-2012 09:49 PM
Low tech/low light planted questions No CO2 Beginner Planted Aquarium 2 08-26-2012 01:19 PM
Plants Ideal For Low Light/Low Tech Aquaria eileen Beginner Planted Aquarium 8 05-20-2010 06:51 AM
Density dhritiman Saltwater Fish Diseases 3 05-28-2007 10:34 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome