AHHH PHOSPHATES

0 Members and 1 Guest are viewing this topic. 434 views

  • Posts: 28
  • Liked: 3
  • Thanks Given: 2
  • Received: 0
  • Location: Corby

Hi all, Just getting to the end of my cycle and doing some water tests my phosphate reading on my Hanna checker is 0.29 very high? to my understanding this doesn't harm fish but is not good for coral which I eventually want to keep so want to get this sorted for when I'm ready. is this reading nearly 3ppm? or 0.29 % of 1ppm, does that make sense lol?

Asco1104

  • Tim
  • Global Moderator
  • Posts: 2,161
  • Liked: 526
  • Thanks Given: 320
  • Received: 441
  • Location: Camberley
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/tims-first-and-last-upgrade/msg42396/#msg42396

Reply #1

Hi it’s 0.29ppm

Tell us a bit about your tank and what methods of nutrient export are you using long term.
How did you cycle the tank to get that high a reading of phosphate?


Tim

ajm83

  • Andy
  • Global Moderator
  • Posts: 472
  • Liked: 105
  • Thanks Given: 113
  • Received: 71
  • Problems: 99
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/andy's-85l-nano/new/#new

Reply #2

Hi it’s 0.29ppm

Tell us a bit about your tank and what methods of nutrient export are you using long term.
How did you cycle the tank to get that high a reading of phosphate?


Tim

This, + what rock did you use?

Asco1104

  • Tim
  • Global Moderator
  • Posts: 2,161
  • Liked: 526
  • Thanks Given: 320
  • Received: 441
  • Location: Camberley
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/tims-first-and-last-upgrade/msg42396/#msg42396

Reply #3

Good point,un cured rock will play havoc with phosphate levels


Tim

TOMMY B32

  • Posts: 28
  • Liked: 3
  • Thanks Given: 2
  • Received: 0
  • Location: Corby

Reply #4

I started out with a prawn which was to slow was in there about a week with a very tiny ammonia rise. I then purchased some dr tims and stuck the whole bottle in, that took my ammonia to 1.60ppm took around 1.5 days for it to reach 0. just waiting for the last amount of nitrite to reach 0. I have around 60kg of dry rock, the guy I got the set up from said it had been cured in a acid bath for 5 weeks (see pic). I did not wash the sand I got from him and briefly rinsed the dry pukani rock in rodi water. Not sure if the rock is leaching but I have stuck about a quart of a 500g tub of rowa phos is a filter sock so it's just gently bubbling around (no reactor yet) it has reduced phosphate to 0.20. I do have a salifert kit which is measuring almost 0 very light tinge but hard to read the chart! I do have the expected diatom bloom with hints of green algae so phosphates cannot be 0?
Last Edit: Oct 10, 2017 10:21:39 pm by TOMMY B32

Asco1104

  • Tim
  • Global Moderator
  • Posts: 2,161
  • Liked: 526
  • Thanks Given: 320
  • Received: 441
  • Location: Camberley
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/tims-first-and-last-upgrade/msg42396/#msg42396

Reply #5

If the rock wasn’t soaked for a good 2-3 weeks then a 100% water change, soaked again until 0 phosphate, then that will be the source of the phosphate

You have 2 options really, carry on as you are with your cycle and change the Rowa out every other day as it will get exhausted very quickly. And expect a gha outbreak.

Or remove the rock and cure it. Wich I know is a pain but might save a lot of problems later on.

The sand will probably have loads of crud in it if it was Old sand, you might not have got all the acid off the rock to if it was just a quick rinse.


Tim

TOMMY B32

  • Posts: 28
  • Liked: 3
  • Thanks Given: 2
  • Received: 0
  • Location: Corby

Reply #6

Sorry I probably wasn't clear in my original post. the guy had the tank setup for 3 months after he cured the rock. he had to sell the whole setup as he got a new job requiring him to be away from home for extended periods of time so couldn't  look after the tank. From what I could tell he set the tank up and added 2 clown fish and that was it before he  had to shut down. I can't remove the rock now the putty has set and I know I would never get the scape back to what it was. If my first lot of rowaphos took it from 0.29 to 0.20 I think If i just use the rest of the tub it should take me to 0? It's not cheap stuff though! Can anyone let me know what produces phosphate, Over feeding? If so it could have been the prawn decaying? It was in there for about a week before I took it out...

Asco1104

  • Tim
  • Global Moderator
  • Posts: 2,161
  • Liked: 526
  • Thanks Given: 320
  • Received: 441
  • Location: Camberley
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/tims-first-and-last-upgrade/msg42396/#msg42396

Reply #7

Oh ok that’s not so bad, phosphate is a by product of matter breaking down, over feeding would do it in 2 ways, fish waste breaking down and the uneaten food breaking down.


Tim

Paddone

  • Posts: 159
  • Liked: 37
  • Thanks Given: 13
  • Received: 18
  • Location: Kent

Reply #8

As above, fish food and waste are the biggest contributors. It it can also come from:

Water you add to the tank (RO hopefully should be >0.1ppm but can be higher if unit is faulty or depleated)
Salt you use in water changes (some cheap salt has it in small amounts and I have read salt left unsealed takes in atmospheric moisture and with it nasties like PO4)
PH buffers
Carbon in filter media

One way to rule out your water is to test your RO then mix up some salt water and test again. If you are getting PO4 readings on these then you water or salt has PO4 in it.

ajm83

  • Andy
  • Global Moderator
  • Posts: 472
  • Liked: 105
  • Thanks Given: 113
  • Received: 71
  • Problems: 99
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/andy's-85l-nano/new/#new

Reply #9

An acid bath just takes off the outer layers of rock. If there's phosphate bound underneath it can still leach.

I think this is what's happened with my tank.  Some of my rocks were 'pukani' dry rock.  I dipped them in vinegar but probably not for long enough.  After a few months in the tank, they've gone very green, whereas none of the other rocks (Caribsea RealReef) have.
Last Edit: Oct 11, 2017 11:14:41 am by ajm83

TOMMY B32

  • Posts: 28
  • Liked: 3
  • Thanks Given: 2
  • Received: 0
  • Location: Corby

Reply #10

I have tested my RODI water its not the source of phosphates, im using the aqua forest salt after seeing a post on here and its the cheapest salt my LFS sells conveniently but will need to test this. Im fairly sure the main reason for my phosphate level will be the prawn that was decomposing before I removed it. Strange my Hanna checker recorded 0.29 and the Salifert as next to zero and its in date. just got some more reagent so will re test it later, upon reading the instructions I see you must make sure there are no air bubbles on the vial I didn't check this. will change out my Rowaphos tonight also.

will need to get a reactor ASAP, with a level of 0.20 would that be difficult and lots of rowaphos to get the down to 0.03?

Sorry for any silly questions its my first marine setup and coming from freshwater so complete newb!

Asco1104

  • Tim
  • Global Moderator
  • Posts: 2,161
  • Liked: 526
  • Thanks Given: 320
  • Received: 441
  • Location: Camberley
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/tims-first-and-last-upgrade/msg42396/#msg42396

Reply #11

With levels that high it’s better to use a little and change it out more often than putting a large amount of Rowa in. 


Tim

ajm83

  • Andy
  • Global Moderator
  • Posts: 472
  • Liked: 105
  • Thanks Given: 113
  • Received: 71
  • Problems: 99
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/andy's-85l-nano/new/#new

Reply #12

With levels that high it’s better to use a little and change it out more often than putting a large amount of Rowa in. 


Tim

What about a lanthanum chloride based one? Nuke it in one go (assuming there's nothing but rock in there?)

Thanks:


Asco1104

  • Tim
  • Global Moderator
  • Posts: 2,161
  • Liked: 526
  • Thanks Given: 320
  • Received: 441
  • Location: Camberley
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/tims-first-and-last-upgrade/msg42396/#msg42396

Reply #13

Yes that’s a option if you are using a filter sock and watch your kh because it binds the phos to it so kh will drop.


Tim

Gav

  • Global Moderator
  • Posts: 1,761
  • Liked: 400
  • Thanks Given: 686
  • Received: 323
  • Location: Highlands
  • Tank Thread: https://reefbase.co.uk/members'-tanks-6/gav's-aqua-oak/

Reply #14

An aluminium oxide based remover is another option that may be more effective as it will drop Po4 levels quickly , before moving on to GFO if that's what you'd prefer once lowered .

Tags:


Related Topics

24 Replies
3233 Views
Last post Apr 12, 2016 9:21:11 pm
by HK_Fuey
Phosphates!

Started by Debbiem « 1 2 » Chemistry

15 Replies
1395 Views
Last post May 3, 2016 5:58:24 pm
by HK_Fuey
4 Replies
701 Views
Last post Sep 13, 2016 12:06:35 am
by HK_Fuey
8 Replies
858 Views
Last post Sep 27, 2016 6:53:50 pm
by Marty
20 Replies
1065 Views
Last post Oct 9, 2016 2:14:50 pm
by HK_Fuey