• You are viewing the forum as a Guest, please login (you can use your Facebook, Twitter, Google or Microsoft account to login) or register using this link: Log in or Sign Up
  • You can now follow UKAPS on Instagram.

Lava Rock as Hardscape - How much does it really affect water quality?

AKD594

Seedling
Joined
8 Apr 2016
Messages
12
Location
Berkshire, UK
Hi All

Just a quick question regarding Lava Rock as hardscape.
I've read in numerous places that lava rock acts as a great area for colonising denitrifying bacteria and thus will improve water quality.
.
Just wanted to ask you guys if (from your experience) you have found this to be true.
The main reason for this question is I am planning a small 25L/5ish Gallon low-tech tank and I figure I should utilise as many different avenues as reasonably possible to improve water quality.

Thanks in advance
 

pepedopolous

Member
Joined
22 May 2011
Messages
678
Location
Prague, Czech Republic
It's more porous but you still need to do water changes. I can't imagine anything you could use that would change that. So, if you would prefer to use another type of rock, don't worry about it. I use lava rock because it's cheap, light, and the dark type is very attractive.

P
 

AKD594

Seedling
Thread starter
Joined
8 Apr 2016
Messages
12
Location
Berkshire, UK
Such a quick response, thanks buddy.
I intend to change water regularly (especially with such a low tank volume).
Was just curious if anyone thinks that there is any noticeable increase in water quality through utilising lava rock.
 

Andy D

Member
Joined
27 Apr 2013
Messages
1,461
Was just curious if anyone thinks that there is any noticeable increase in water quality through utilising lava rock.

I use it a lot but to be honest I am not sure how I could measure if there was an improvement in quality and what measure would you use?

It will certainly add a decent amount of surface area for nitrifying bacteria but given we are running (typically) heavily planted tanks, they will deal with the ammonia etc anyway.
 

rebel

Member
Joined
4 Aug 2015
Messages
2,265
Lava rock is great as cheap filter media... I suspect it will perform equally as good as the expensive stuff. Would be a neat experiment to do.
 
  • Like
Reactions: MWS

MWS

Member
Joined
2 Mar 2015
Messages
40
Location
Nottingham/Derby
I've used Lava rock in all my filters for a few years now - even dumping any original media that ships with the filters, it doesn't seem to hamper flow as much.

Depending on the time of year £3 - £7 gets you more gas barbecue briquettes (Lava Rock) than you know what to do with at most supermarkets - considerably more expensive at garden centres, nevertheless still cheap when pitched against the "special" stuff peddled by filter manufacturers.

I have no way of testing/substantiating this but can say I've never had a problem.
 
Top