LOGIN

RSS Facebook Twitter YouTube
GLOSSARY       

SEARCHGLOSSARY

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

PROFILESEARCH

Avatar

Please consider registering
guest

sp_LogInOut Log In sp_Registration Register

Register | Lost password?
Advanced Search

— Forum Scope —




— Match —





— Forum Options —





 

Minimum search word length is 4 characters - maximum search word length is 84 characters

sp_Feed Topic RSS sp_TopicIcon
Coloured Gravel Warning
December 28, 2010
6:00 pm
Avatar
Steve Waring
Member
Forum Posts: 44
Member Since:
October 16, 2010
sp_UserOfflineSmall Offline

My friend Matt recently tested his pH and found it way to alkaline, we did a Kh test and found it was 11° !

He did a 1ℓ change every two days with water from my tank which is 6°Kh. After thirty changes, having cycled the contents of this 30ℓ tank we tested again and found 10°Kh.

On considering the tank, we noticed white showing through scratches on the recently added black gravel. The gravel is the plastic coated sort sold very cheaply at general pet shops.

We took some out, snapped the bits in two, and poured acid on them. They started to fizz.

Culprit found. The gravel will be changed and we will keep using my tank for donor water until things stabilise.

I find the particularly worrisome, because people might be buying this gravel thinking it is good for tetras.

This gravel comes in all sorts of colours, including bright pink. I assume that none of it is inert.

The good news is that the rise in ph and Kh does not seem to have affected his six Aplocheilichthys normani.

December 29, 2010
12:01 pm
Avatar
Matt
Málaga, Spain
Admin
Forum Posts: 8239
Member Since:
June 13, 2011
sp_UserOfflineSmall Offline

Cheers Steve. /thumbs_up.gif" style="vertical-align:middle" emoid=":thumbsup:" border="0" alt="thumbs_up.gif" />

Cake or death?
December 29, 2010
12:37 pm
Avatar
Eyrie
Veteran
Forum Posts: 571
Member Since:
March 21, 2008
sp_UserOfflineSmall Offline

Nice work on identifying the problem.

And this further confirms my prejudice against ghastly coloured gravel.

Mature, sensible signature required for responsible position. Good prospects for the right candidate. Apply within.
December 29, 2010
6:27 pm
Avatar
Steve Waring
Member
Forum Posts: 44
Member Since:
October 16, 2010
sp_UserOfflineSmall Offline

QUOTE (Eyrie @ Dec 29 2010, 12:20 PM) < {POST_SNAPBACK}>
Nice work on identifying the problem.

And this further confirms my prejudice against ghastly coloured gravel.


Minor correction, my water used for the changes is 4°Kh. It's 6°Gh. I must have been tired when I wrote this. Does not make any difference to the thrust of this warning though.

I'd left the bits of gravel in the saucer with acid on them overnight, and they had turned to mush by the morning.

I don't like most of the coloured gravel either, but I had thought that the black one was acceptable.

January 5, 2011
6:45 pm
Avatar
Steve Waring
Member
Forum Posts: 44
Member Since:
October 16, 2010
sp_UserOfflineSmall Offline

The gravel has now been replaced with Tesco Low Dust Lightweight Cat Litter. On clearing out the old gravel, lots of chips of the black plastic were found which exposed what I presume to be limestone.

Water from my tank will be used to gradually bring down the Kh.

I have seen black resin coated gravel made from "selected silicate aggregates" which claims to be inert. This is much more expensive than the cheap rubbish that messed up the Kh in my friends tank.

Forum Timezone: Europe/Paris

Most Users Ever Online: 246

Currently Online:
1 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Devices in use: Desktop (1)

Top Posters:

Stefan: 1567

Plaamoo: 1253

mikev: 1134

Malti: 1099

Mark Duffill: 1012

Member Stats:

Guest Posters: 0

Members: 30289

Moderators: 0

Admins: 2

Forum Stats:

Groups: 4

Forums: 10

Topics: 4595

Posts: 36615

Newest Members: adennett, Brawny, qchris87, grayergroove, bhisma wildan

Administrators: dunc: 1323, Matt: 8239