Go Back   Aquarium Advice - Aquarium Forum Community > General Aquarium Forums > DIY Projects

Join Aquarium Advice Today
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
Old 03-01-2009, 06:44 PM   #1
Aquarium Advice Newbie
Join Date: Feb 2009
Posts: 3
Heat treated glass

I built a 68 gallon tank with 8mm glass and it exploded when I filled it. The seams held and the actual glass broke. Does any one know if heat treated glass is a great option? Or what i need to do to ensure a repeat does not happen?


telsona is offline   Reply With Quote
Old 03-01-2009, 08:03 PM   #2
Aquarium Advice Activist
Join Date: Sep 2008
Posts: 188
Did you cut that glass to size?
If so, that's why it blew up. Glass is tempered after it's cut and when you cut it, stress lines are broken and the glass breaks. Usually this happens during the cutting, but I have seen tempered glass survive the cutting and blow up later.
If I'm not mistaken, most aquariums have a tempered bottom and untempered sides. I believe it's a safety thing as if there is an accident the side will just crack where if it were safety glass, the whole side would disappear (as you experienced) and there'd be a flood.

Ruadh is offline   Reply With Quote
Old 03-01-2009, 09:03 PM   #3
AA Team Emeritus
jsoong's Avatar

Join Date: Aug 2003
Location: Edmonton, Canada
Posts: 4,222
8mm glass is too thin, I would think. My old 70 gal tank (standard height), with untempered sides, uses almost 1/2" thick glass ~=12mm. My new one is ~10mm.

The actual thickness you need is determined by the height of the tank, the taller tanks need thicker glass, even with less water in it.

This is the tank calculator:

You can use tempered glass to reduce the thickness, but that needed to be cut first before tempering, so is really feasible in factories. Plus, you will not be able to cut or drill it at all after the tempering.

Other possibilities would include - the tank not being square, putting extra stress on the glass; a deep scratch that had weaken the glass; or a chipped at the edge that propagated into a crack. <That happened to my old tank. I cut a u-shaped slot for an overflow, and I must have chipped a corner, as a crack propagated from the corner after several months. I should have drilled holes at the corners so the corner was rounded to prevent the stress ..... but that was an old scratched up tank I was playing with .....>
80 gal FW with 30 gal DIY wet/dry/sump.
9 fancy golds, 1 hillstream loaches, 1 rubber-lip pleco (C. thomasi), 3 SAEs, small school of white cloud minnows, planted.
jsoong is offline   Reply With Quote

eat, glass, heat

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
copper treated LR Susie Q Saltwater Reef Aquaria 6 08-30-2008 06:25 PM
Fish with ich...treated whole tank Kaija82 Saltwater Fish Only & FOWLR 13 08-26-2008 01:03 PM
Glass tank tops on or off? Heat concern Latitude_change Saltwater & Reef - Getting Started 27 05-01-2008 09:19 AM
reverse osmosis treated water luv2bfishin Saltwater & Reef - Getting Started 7 02-29-2008 02:37 PM
Pressure treated lumber sun_lax Freshwater & Brackish - Coldwater, Native Fish & Ponds 7 08-01-2005 04:51 PM

» Photo Contest Winners

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 11:39 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.