Advice (please) on reusing old live rock in a new marine set-up

0 Members and 1 Guest are viewing this topic. 998 views

  • Posts: 12
  • Liked: 0
  • Thanks Given: 0
  • Received: 1
  • Location: Woking, Surrey
Hi,
Can I ask for some advice please?
In one sentence: Should I use rock from an old tank which crashed in my new tank even if it no longer "live"?


I have a 7ftx2x2 -  160 gallon marine tank which crashed a few months back.
I've stripped it, changed filters etc etc. Essentially its now a new tank and I am about to start slowly restocking in a few weeks when the tank matures.

I have 100kg of live rock from my old tank that, after 6 years in the old tank, wasn't much use as live rock.
It has been removed, jet washed and left to dry
I don't need it to be "live" rock in my new tank set-up as the bio filtraion is done elsewhere.
Should I use it as dry rock simply to save me buying another 50kg of rock that will cost a good £300
Or leave it because it might have lots of dry dead things in which could mess up my new tank?
What do you think?

Thanks for any advice. Gratefully received.
(If you're feeling super clever I have question about water flow through rock work in here too...)

Giles

HK_Fuey

  • Graeme
  • Administrator
  • Posts: 6,040
  • Liked: 1714
  • Thanks Given: 473
  • Received: 1407
  • Location: Newcastle
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/graeme's-6x2x2-840l/

Reply #1

Stick it in a bucket/barrel with salt water, a heater, and a pump.  Feed it every couple of days to start the cycle, and then test the water and see if it's leaching or not.  100 water changes to remove everything that's leached and test again.  Once parameters are all zero, you're good.

Marty

  • Global Moderator
  • Posts: 4,546
  • Liked: 1431
  • Thanks Given: 1469
  • Received: 853
  • Location: Norwich
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/marty's-reef-tank/

Reply #2

What it's going to cost you to stock that 7ft tank what's  £300 for rock compared to the cost of lost stock should them rocks contain something they should not.

myself personally would replace for the sake of £300 compared to what you could loose if those rocks are harbouring something nasty that's leaching !!!

Sent from my SM-G935F using Tapatalk


gilesguest

  • Posts: 12
  • Liked: 0
  • Thanks Given: 0
  • Received: 1
  • Location: Woking, Surrey

Reply #3

That's my dilemma ...   £300 to get 100kg of dry rock for the tank is a good buy vs something horrid being in the rocks.
 However £300 spent totally unnecessarily given they have been sprayed, dried seems a waste ...

Hmmmm......

gilesguest

  • Posts: 12
  • Liked: 0
  • Thanks Given: 0
  • Received: 1
  • Location: Woking, Surrey

Reply #4

How long can things survive in a rock?


Also, will new 'dry' rock become live over time. This 'old' rock is now so coraline algae covered that it won't ever go "live again"

fr499y

  • Global Moderator
  • Posts: 1,681
  • Liked: 501
  • Thanks Given: 70
  • Received: 314
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/fr499y's-4-footer-mixed-reef/

Reply #5

As soon as live rock is out of salt water, you risk things dieing off.  Yes dry rock will become live in time.

Marty

  • Global Moderator
  • Posts: 4,546
  • Liked: 1431
  • Thanks Given: 1469
  • Received: 853
  • Location: Norwich
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/marty's-reef-tank/

Reply #6

That's my dilemma ...   £300 to get 100kg of dry rock for the tank is a good buy vs something horrid being in the rocks.
 However £300 spent totally unnecessarily given they have been sprayed, dried seems a waste ...

Hmmmm......
I understand it's been dried ECT but what has that rock drawn in and what could it leach...

was it the reason the tank crashed if so why risk it I know I would not for the sake of £300

Sent from my SM-G935F using Tapatalk


gilesguest

  • Posts: 12
  • Liked: 0
  • Thanks Given: 0
  • Received: 1
  • Location: Woking, Surrey

Reply #7

I think you could be right.
The tank death was caused in part by a faulty skimmer, in part by dead spots behind the rockwork and in part by "old tank syndrome" i.e. no one has a clue why.


I didn't know things could leach back out even after it had been washed and completely dried - i thought that killed everything ??

Marty

  • Global Moderator
  • Posts: 4,546
  • Liked: 1431
  • Thanks Given: 1469
  • Received: 853
  • Location: Norwich
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/marty's-reef-tank/

Reply #8

I think you could be right.
The tank death was caused in part by a faulty skimmer, in part by dead spots behind the rockwork and in part by "old tank syndrome" i.e. no one has a clue why.


I didn't know things could leach back out even after it had been washed and completely dried - i thought that killed everything ??
No it don't kill everything if say the rocks have sucked in a load of copper that's never coming out no matter what you do.

Drying will kill anything that's "live" but it won't remove element nasties , copper ECT and what ever else may of snuck in and got bound up in the rocks.

Sent from my SM-G935F using Tapatalk


gilesguest

  • Posts: 12
  • Liked: 0
  • Thanks Given: 0
  • Received: 1
  • Location: Woking, Surrey

Reply #9

Thanks - I lost £1000 of corals and £750 of fish in the tank meltdown so reusing the rocks might be a false economy ....


Any suggestions on dry rocks? Are there different types or better ones than others?


G


Marty

  • Global Moderator
  • Posts: 4,546
  • Liked: 1431
  • Thanks Given: 1469
  • Received: 853
  • Location: Norwich
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/marty's-reef-tank/

Reply #10

Thanks - I lost £1000 of corals and £750 of fish in the tank meltdown so reusing the rocks might be a false economy ....


Any suggestions on dry rocks? Are there different types or better ones than others?


G
It depends what type of scape you want as you can get pre formed shapes ect

Sent from my SM-G935F using Tapatalk


gilesguest

  • Posts: 12
  • Liked: 0
  • Thanks Given: 0
  • Received: 1
  • Location: Woking, Surrey

Reply #11

Im thinking of two hollow pyramids so i can put returns in the centre of them.
Maybe then jazz it up with bridges etc


ajm83

  • Andy
  • Global Moderator
  • Posts: 914
  • Liked: 235
  • Thanks Given: 165
  • Received: 161
  • Problems: 99
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/andy's-85l-nano/new/#new

Reply #12

I used Caribsea's Real Reef rock,  really really liked it.  @SnowAddict  used it as well.  It's not cheap (but was cheaper for me than liverock from the LFS) but it really does look the part, and no chance of pests.  I measured no phosphate whatsoever leaking from it either.   
Last Edit: Sep 26, 2017 10:10:03 am by ajm83


Related Topics

3 Replies
1328 Views
Last post Feb 26, 2016 3:07:40 pm
by HK_Fuey
4 Replies
1231 Views
Last post Sep 6, 2016 11:25:10 am
by WelshNemo
3 Replies
774 Views
Last post Jan 26, 2017 6:31:29 pm
by Carol
3 Replies
544 Views
Last post May 2, 2017 10:26:46 pm
by Shain Hunton
3 Replies
830 Views
Last post Sep 28, 2017 8:50:27 am
by Asco1104