Go Back   Aquarium Advice - Aquarium Forum Community > General Aquarium Forums > DIY Projects
Click Here to Login

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 08-04-2009, 09:59 AM   #1
Aquarium Advice Regular
Join Date: May 2009
Location: Windsor Ontario Canada
Posts: 54
Hypertufa in freshwater aquarium


I'm wondering about using hypertufa to make rocks for an aquarium.

Are some types of cement OK and others are not? Is it OK to add peat moss to the mix?


Greeny is offline   Reply With Quote
Old 08-04-2009, 11:06 AM   #2
AA Team Emeritus
jsoong's Avatar

Join Date: Aug 2003
Location: Edmonton, Canada
Posts: 4,222
I don't know the answer directly, but I can extrapolate from what I know of cement & fish pond.

Main problem with cement is that it is very alkaline, and will change the water pH for a long time to come. From reading about koi ponds, it is recommended to leave a new cement pond empty of fish for at least a year so the cement will be totally cured. That would involve weathering outside with water in the pond, etc. I supposed if you make a cement ornament, you would need to do the same thing to make sure that the cement is totally inert before adding it to the tank.

The addition of peat to tufa mix is to lighten the cement. The peat will disintegrate, leaving small holes. During the rotting processd, it will prob. change the water chemistry. <We do use peat to lower pH, so I expect the same effect.> However, if you weather the cement object completely, the peat would be long gone by then.

Anyway, it seems that you need a long time to let cement cure to the point of being inert. If you were to use it for fish, you would definitely need to test the object to make sure it is totally cured. <Soak in water for a few weeks & make sure it is inert.> A better alternative would be to use food grade molding plastics/silicone (plastics supply or modeling hobby place). At least you won't have to wait years before using your creation!
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

freshwater, freshwater aquarium

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
What Made You Want A Freshwater Aquarium? fishfreek Freshwater & Brackish - General Discussion 1225 04-24-2018 09:44 AM
Building a new freshwater aquarium ramon82 Freshwater & Brackish - Getting Started 2 10-21-2009 03:27 PM
My First Freshwater Aquarium lym Members Freshwater Tanks Showcase 7 10-28-2007 06:39 PM
freshwater Aquarium Novice Help Please grounded_plane Freshwater & Brackish - Getting Started 2 02-08-2006 08:32 PM
my new freshwater aquarium - help OceanMist Freshwater & Brackish - Getting Started 0 01-10-2006 11:56 AM

» Photo Contest Winners

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 06:00 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.