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post #1 of 4 (permalink) Old 02-09-2013, 06:58 PM Thread Starter
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Question rocks from hardware store

I just picked up a new Marine Land 75 gallon and I'm going to use it as a paludarium with feeder guppies in the water, so this is technically an aquarium question.
I put down a layer of regular fish tank gravel, and now I need bigger rocks to raise the land area above the water line, I figured the easiest way to do this is with 1-2 inch rocks from a hard ware store. the tank dimensions are 48x19x21. Filled only 6-7 inches of water, and land about 1-2 inches higher at 8-9inches off the bottom.

So I have two questions.
1. What rocks should I avoid, Because they could affect my water parameters.
2. What size would be best for Raising the land above water level

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post #2 of 4 (permalink) Old 02-10-2013, 12:48 AM
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What do yo mean by "1-2 inch rocks"? are you looking at flat rocks that are 1-2" thick, (slate, flagstone, etc.), or large pebbles that are 1-2" diameter? or something else?

If you are putting bigger rocks in the tank, I'd probably put them on the bottom, without gravel underneath them, I'd be too concerned with the gravel shifting.

One thing I've heard mentioned that people working with rocks and especially digging fish is to use some of the eggcrate light diffusers, put a sheet of that on the bottom of the tank, and then put the rocks on top- it keeps the rocks from scratching the glass and distributes the weight some.

sounds like a pretty nice sized tank for a paludarium. As to what rocks to use, it depends on what you are putting in, what plants, etc. I believe guppies do pretty well in slightly hard water, so you may not be too concerned about affecting hardness/pH.

Then again, paludariums are more prone to problems with mineral deposits at the waterline, since it's visible, and hardwater will just exacerbate this.
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post #3 of 4 (permalink) Old 02-10-2013, 04:44 AM Thread Starter
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I hadn't thought about stacking thick flat rocks if I can get those in the right size I should probably do that, I was talking about large 1-2 pebbles in my first post.

nothing here but disappointment
dont call me an Aquarist
no, I dont have any axe body spray cause im not a d***** bag
youtube channel https://www.youtube.com/user/abassnamedhank
Sebastian the bullheads journal http://www.plantedtank.net/forums/sh...d.php?t=198343
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post #4 of 4 (permalink) Old 02-11-2013, 05:13 AM
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Ok, thanks for the clarification. a pile of pebbles probably won't pose any risk, but it probably also won't be long-term stable, it will eventually level out.

If you want to do something more permanent, you could silicone them together. (works really well with lava rock, and due to the irregular forms, isn't quite as visible).

you may not find that great of a selection in a typical hardware store, but if you can hit up someplace like a landscape supply, you should be able to get all kinds of rocks for pretty cheap.

Or possibly some sort of salvage store type place - something like granite counters/tiles would be aquarium safe (assuming no adhesives, etc. on it) and you could use broken chunks.
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