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andy.clayton2@hotmail.co.uk

YKS club member
"Dechlorination" 2:01pm Monday 1st Jun


joined: 25th Jun 17
last here: 4:57pm Yesterday
posts: 133
from: Selby, N.Yorks

Just wondering whether anyone out there uses the liquid dechlorinators when undertaking large volume water changes, I.e. 10% or greater?

I ask as the processing rates on most of the in-line dechlorinators would mean that the pond refill times could be quite long.

There has also been a lot of discussion on other forums recently suggesting that the water companies have increased the chlorine content since the pandemic started, which will also impact the efficiency of carbon dechlorinators, requiring a slower throughput and shorter life (gallons dechlorinated before the charge is spent).

Andy.c
Karenc"RE: Dechlorination" 2:45pm Monday 1st Jun


joined: 15th May 17
last here: 1:54pm Saturday 11th Jul
posts: 30
from:

I use sodium thiosulphate as my dechlorinator, I do have a 3 pod unit but I don't rely on it for dechlorination
14TB

YKS club member
"RE: Dechlorination" 8:27pm Monday 1st Jun


joined: 6th Mar 10
last here: 12:14am Tuesday 14th Jul
posts: 6668
from: SOUTH YORKS

As Karen said sodium thiosulphate very cheap and effective.

I believe if your filter is not mature it may struggle as it does leave some residual ammonia.

In an immature filter it may be wise to remove ammonia with zeolite.

Effective at 125gms per 1 litre boiled then cooled water to make the useable mixture.
Then treat at 100ml per 1000 gallons.

Hope this helps.


Tony




STAY SAFE, STAY HOME,STAY WELL ,THANK YOU KEY WORKERS!!!!
andy.clayton2@hotmail.co.uk

YKS club member
"RE: Dechlorination" 10:39pm Monday 1st Jun


joined: 25th Jun 17
last here: 4:57pm Yesterday
posts: 133
from: Selby, N.Yorks

Thanks Tony,

The filters are fine and water parameters good, but I’m losing water through evaporation and (very) regular cleaning due to high levels of mechanical debris. I’ve been looking at various new dechlorinators and there’s plenty of choice , but also started to compare the chemical dechlorinators against some of these for gallons treated and they look favourable when doing a large top up, both in terms of cost and time (fill rates).

Cheers, Andy.c.
andy.clayton2@hotmail.co.uk

YKS club member
"RE: Dechlorination" 10:30pm Monday 1st Jun | message edited once


joined: 25th Jun 17
last here: 4:57pm Yesterday
posts: 133
from: Selby, N.Yorks

Thanks Karen,

I’m on a twin pod unit with (almost) new cartridges and after reading some recent threads got some DPD4 tablets to check how well they were working and found they are not removing all of the chlorine, even on a very low flow rate, and certainly less than would be required for any water change.

Are you using the sodium thiosulphate crystals?

Regards Andy.c.
voodoo_15_uk

YKS moderator team..
"RE: Dechlorination" 10:45am Tuesday 2nd Jun


joined: 8th Nov 12
last here: 3:50pm Tuesday 7th Jul
posts: 984
from: York

I use sodium thiosulphate too. Got 1kg off eBay for a few quid. Get the food grade stuff though. I just put a teaspoon full into my moving bed module


Laura

14TB

YKS club member
"RE: Dechlorination" 1:52pm Tuesday 2nd Jun


joined: 6th Mar 10
last here: 12:14am Tuesday 14th Jul
posts: 6668
from: SOUTH YORKS

Do not use sodium thiosulphate during the 4 days before treating with pp as it will just neutralise it.


Tony




STAY SAFE, STAY HOME,STAY WELL ,THANK YOU KEY WORKERS!!!!
andy.clayton2@hotmail.co.uk

YKS club member
"RE: Dechlorination" 2:07pm Tuesday 2nd Jun


joined: 25th Jun 17
last here: 4:57pm Yesterday
posts: 133
from: Selby, N.Yorks

Thanks for the warning Tony, but I’m hoping to not have to use PP.
andy.clayton2@hotmail.co.uk

YKS club member
"RE: Dechlorination" 2:05pm Tuesday 2nd Jun


joined: 25th Jun 17
last here: 4:57pm Yesterday
posts: 133
from: Selby, N.Yorks

Are you also still running through a “big blue” first?

Are you adding the crystals regularly, to cover trickle feed, or just when you do larger water changes?

Andy.c.
Karenc"RE: Dechlorination" 7:00pm Wednesday 3rd Jun


joined: 15th May 17
last here: 1:54pm Saturday 11th Jul
posts: 30
from:

I make up the solution from crystals and slightly cooled boiled water as mentioned above post, easy and cheap
JIMMY/S

YKS moderator team..
"RE: Dechlorination" 9:48pm Wednesday 3rd Jun


joined: 13th Jul 10
last here: 11:36am Yesterday
posts: 2522
from: West Yorkshire

Be careful with Sodium Thiosulphate I used it and it sent my KH & Ph crazy + Ammonia - fish really went off it.

Jim
andy.clayton2@hotmail.co.uk

YKS club member
"RE: Dechlorination" 12:57pm Thursday 4th Jun


joined: 25th Jun 17
last here: 4:57pm Yesterday
posts: 133
from: Selby, N.Yorks

Thanks for the heads-up Jimmy.

I’ve ordered some crystals but as I’ve never used it before I was planning to trial in large tubs/vats, rather than apply directly into the pond. I can then check the parameters of the “clean” water before transferring it into the pond.

I’ve been using the tubs this week to let chlorine gas off while I waited for a new dechlorinator to arrive and have been surprised at the variance in time each Fill has taken to clear chlorine. Anywhere between 6 and 36 hours! I’m not a chemist, so it’s unclear how this time is impacted by atmospheric conditions and the levels of chlorine in the raw water, but it’s food for thought!

Andy.c.
14TB

YKS club member
"RE: Dechlorination" 12:01am Friday 5th Jun


joined: 6th Mar 10
last here: 12:14am Tuesday 14th Jul
posts: 6668
from: SOUTH YORKS

Be interesting to see your trial results Andy,

ST is the major active ingredient in many branded liquid DE chlorinators.

Am no scientist ,but believe it neutralizes chlorine and the chlorine in chloramine leaving only residual ammonia.



Tony




STAY SAFE, STAY HOME,STAY WELL ,THANK YOU KEY WORKERS!!!!
Steven Doneena

YKS club member
"RE: Dechlorination" 12:15am Thursday 11th Jun
joined: 20th Feb 17
last here: 7:58am Saturday 11th Jul
posts: 69
from:

I have read that some treatments suggest dosages for the whole pond and not just the water you add for some reason

Steven

14TB

YKS club member
"RE: Dechlorination" 9:53am Thursday 11th Jun


joined: 6th Mar 10
last here: 12:14am Tuesday 14th Jul
posts: 6668
from: SOUTH YORKS

That's right Steven,
125gms per 1 litre to make a stock solution .
Then treat whole pond at 100ml per 1000 gallon.


Tony




STAY SAFE, STAY HOME,STAY WELL ,THANK YOU KEY WORKERS!!!!
andy.clayton2@hotmail.co.uk

YKS club member
"RE: Dechlorination" 5:43pm Thursday 11th Jun


joined: 25th Jun 17
last here: 4:57pm Yesterday
posts: 133
from: Selby, N.Yorks

I’ve got the ST, but not used it’s yet.

I have also upgraded my dechlorinator from one of the the 10” Models to the EA 130 as even with a new cartridge and low flow, The 10” was still passing Chlorine.
dave23869

YKS club member
"RE: Dechlorination" 2:24pm Yesterday


joined: 2nd May 04
last here: 5:17pm Today
posts: 1259
from: near whitby north yorkshi

Where’s best place to get the sodium thiosulphate online I use the aquasource revitalise but it’s a bit pricey compared to making your own just used last I had after my pp treatment for trichodina


4000 gallons queni koi drum and jbr plastics bio chamber drum fed from bottom drain 3 inch gravity skimmer also into drum 55 watt submersible uv 240 litres air and 12 fishI
14TB

YKS club member
"RE: Dechlorination" 11:35pm Yesterday


joined: 6th Mar 10
last here: 12:14am Tuesday 14th Jul
posts: 6668
from: SOUTH YORKS

Dave try fleabay , amazon or any chemical supplier .

A good price is about £7 per kilo or less.


Tony




STAY SAFE, STAY HOME,STAY WELL ,THANK YOU KEY WORKERS!!!!
andy.clayton2@hotmail.co.uk

YKS club member
"RE: Dechlorination" 8:24am Thursday 18th Jun


joined: 25th Jun 17
last here: 4:57pm Yesterday
posts: 133
from: Selby, N.Yorks

I got mine from e-bay for £7/kg (2x500g).
voodoo_15_uk

YKS moderator team..
"RE: Dechlorination" 3:09am Monday 22nd Jun


joined: 8th Nov 12
last here: 3:50pm Tuesday 7th Jul
posts: 984
from: York

eBay best place to get ST. Get food grade stuff though.

The by product of ST is ammonia but it shouldn’t be much if you only use what you need and your filter will soon sort it out.


Laura



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