Rock Check!
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > Aquascaping

Thread Tools Display Modes
Old 05-12-2014, 12:41 PM   #1
Algae Grower
BearMitten's Avatar
PTrader: (2/100%)
Join Date: Apr 2014
Posts: 28

Rock Check!

Hey everyone, I'm trying to rescape a 20 gallon and wanted to add some nice pieces of hardscape. I braved a blistering sun and extremely cold water possessed by a mighty current to grab some of these choice pieces. Granted the water was at most only 4ft deep but none the less, it was an adventure of epic proportions : )
Here they are:

I tried to stay away from yellowish rocks that could contain calcite but the majority of the rocks do have shiny flecks (pyrite?) in them, some more then others. Do I need to cull all these out or can I keep them?

Thanks for the help TPT!
BearMitten is online now   Reply With Quote
Sponsored Links
Old 05-12-2014, 01:17 PM   #2
Wannabe Guru
PTrader: (0/0%)
Join Date: Sep 2012
Location: las vegas
Posts: 1,195

River rocks should be fine to use, not sure about the yellowish one. It might just be a river rock as well.
HUNTER is offline   Reply With Quote
Old 05-12-2014, 01:35 PM   #3
Wannabe Guru
jmf3460's Avatar
PTrader: (10/92%)
Join Date: Aug 2013
Location: Greensboro, NC
Posts: 1,126

what you do is test them. use the nitrate #2 bottle from your API test kit and place a drop on the rock, if it bubbles up then you have a rock that will raise the ph of your tank and throw it out. if no bubbles then its a "neutral" rock and safe to use. you can also use vinegar if you don't have an API test kit but vinegar doesn't show the bubbles as well.
jmf3460 is online now   Reply With Quote
Old 05-12-2014, 05:11 PM   #4
Planted Tank Enthusiast
metageologist's Avatar
PTrader: (0/0%)
Join Date: Jan 2008
Location: Mannsville NY
Posts: 794

Based on what I can see in the photos you look to have a mixture of granites possibly gneiss, and possibly some sandstone and mudstones. As stated above get some acid to betermine if they contain Ca [lime stone]. As far as the Shiney flakes they are most likely mica, since you have some igneous and metamorphic rocks. Don't worry about them as they are basic silica minerals.

One additional thing just because it's a river rock does not mean it's safe. I know places where the rivers are dead because of the rocks that are in them. Never assume just because the rock is in the river it's inert.

Have a gniess day. -Scott
GEOLOGY Rocks Have A Gneiss Day
metageologist is online now   Reply With Quote

Thread Tools
Display Modes

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

Forum Jump

All times are GMT. The time now is 01:05 PM.

Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012