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Hi guys please help me with this, I purchased a 55 gallon tank with stand, filter, lighting, heater and lots of rocks for $180. But my question is that are these stones too heavy for the fish tank? I have about close to 2 inches of gravel then top off with the stones. The larger ones in the middle I pick them up from a local lake shore. Can you guys please help me out. thanks.
 

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I wish that I could find that video that Orlando did about testing the weight of stones in an aquarium. It is really amazing.
 

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When using an extra thick layer of substrate, or adding a load of stones in the tank, I would pay more attention to the aquarium stand than the aquarium itself. A stand which would take the load and not change in shape (sag or buckle) will keep your aquarium safe, the total weight would not matter.

Next attention must be given to particular pressure points when piling rocks and/or using bigger rocks. Pressure when excessive at points, tend to crack the glass; the potential is a waiting time bomb. The trick here is to use a firm grid (like craft net) just above the glass before adding the substrate and the rocks. The grid tends to spread the pressure created at points wider and thus reduce the potential danger.
 

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People with cichlid tanks but a LOT of rock work, way more than you have pictured.

Im pretty sure you will be fine with what you have. If you want added insurance you can put some eggcrate stuff, like PP mentioned (from home depot in the lighting section) under the substrate to rest the rocks on this way all the weight is distributed and you dont have to worry about pressure points

http://www.cichlidforums.com/showthread.php?t=33164&highlight=egg+crate
 

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Listen to essabee. I'll add my two cents: I used "egg crate"return panel. I own my own hvac business so I had it laying around and it's basically to spread the weight evenly as esserbee stated. See if local hvac suppliers will sell it to you. It should only be $15 and its plastic,it did the tr
ick for me.
 

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Tanks are pretty strong. I had 300+ lbs of rock stacked in my old cichlid tnak 120g 60x18x21.

Theo nly problem is if it comes crashing down. :)
 

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If I can find that video of the guy stacking stones in an aquarium, you would be amazed!
Is this the video with the ten gallon tank and the rocks stacked up above the tank rim and then eventually standing on it? I saw that video on youtube about a year ago, then looked it up about 3 months after that and just could not find it! It must've been removed I guess...
 

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Tempered glass bottom panels normally used in rimmed all glass aquariums are very strong!
To give you an idea of how strong! I have used a 4x4 sheet of tempered 1/4" glass over my carpet to roll my office chair around on. That's a great deal of weight on 5 little wheels :)
md
 

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