Reef Central Online Community
Blue Zoo Aquatics

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping ...an online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > General Interest Forums > The Reef Chemistry Forum
Register Blogs FAQ Calendar Mark Forums Read

Notices

User Tag List

Reply
Thread Tools
Old 02/23/2015, 03:04 AM   #51
AMC LSS
Registered Member
 
Join Date: Feb 2015
Location: China, currently...
Posts: 7
I haven't actually filtered a sample for phyto, no. It probably is worth doing, but I suspect I'd have to process a fairly large sample because of how thinly distributed it would have to be. I don't have any screens or filter bags of a fine enough grade to do that at the moment, and probably won't be able to get any quickly.... My main reasons for believing that this isn't algal, however, are: 1) no associated turbidity - as you'd know from greenwater cultures, phyto makes water look murky fast. 2) the system has very heavy foam fractionation compared to a typical home system, and fractionation is generally pretty good at stripping phyto cells - I do monitor the effluent quality and it doesn't show signs of much phyto presence (but may put someunder a microscope tomorrow to confirm). And 3) the system has a pretty high turnover through ~40mJ/cm^2 of UV, which ought definitely inhibit a bloom of this size taking hold this quickly.

I did run today a transmittance/absorbance test in 1nm increments from 340nm to 900nm. The results were... interesting, but not particularly useful.


AMC LSS is offline   Reply With Quote
Old 02/23/2015, 11:44 PM   #52
AMC LSS
Registered Member
 
Join Date: Feb 2015
Location: China, currently...
Posts: 7
Sorry, tried to post the results last night, obviously didn't show up.



Ignore the fact there are two lines, both are the same sample, just ran it twice to sort out how much noise was present.

There's a fall-off in transmissivity towards the true violet / longwave UV end of the spectrum... at a guess, this would be due to absorbtion by DOC. Also a slight drop-off as we move into the near-IR range. But very little variation across most of the visible spectrum - I had expected to see some activity to either side of the green area of the spectrum, around 5-600nm, to suggest absorbtion, attenuation, etc of other wavelengths was allowing the green to predominate. But the results aren't very obvious in this respect; yes, the curve peaks fractionally higher in the green range, but they are fractions of a percent of total transmissivity. And over-all transmissivity is very good, better than 96% even at it's worst point (which is generally better than you would expect for, say, potable tapwater). So I remain at a bit of a loss.


AMC LSS is offline   Reply With Quote
Old 02/24/2015, 02:26 PM   #53
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,486
I don't understand this, either. Greenish water usually means phytoplankton. I've never heard of a tank going green like this. Your system is very large, though, so I suspect that we might not notice the slight green tint in a smaller system.


__________________
Jonathan Bertoni
bertoni is offline   Reply With Quote
Old 02/24/2015, 06:16 PM   #54
billsreef
Moderator
10 & Over Club
 
billsreef's Avatar
 
Join Date: Oct 1999
Location: Long Island, NY/North Miami
Posts: 36,550
I've never seen what you've described, but my large volume systems have always been NSW.

See if you can get a hold of wolfblue, he works with very large scale public aquarium life support systems and might be able to offer some insight.


__________________
Bill

"LOL, well I have no brain apparently. " - dc (Debi)

Current Tank Info: Far too many tanks according to my wife, LOL.
billsreef is offline   Reply With Quote
Old 02/24/2015, 11:30 PM   #55
AMC LSS
Registered Member
 
Join Date: Feb 2015
Location: China, currently...
Posts: 7
Thanks, guys. I think Bertoni has probably hit the nail on the head, that it just isn't noticeable in smaller-scale systems. I really wanted to see if anyone else had experienced this with the same salt, before I tried to argue for switching back to the original brand - obviously, when you're making ~50,000 gallons of saltwater per week, even small differences in salt costs can add up.

I'm still convinced that it is some type of oxidation reaction occurring with something in the salt, as it mixes relatively clear, but turns greenish after aeration, and more greenish on exposure to ozone.

On the bright side, it seems like whatever it is is adsorbs effectively onto activated carbon - sent about fifteen thousand gallons to our water recovery tank yesterday and circulated it through GAC overnight, most of the green tint was gone by this morning. I've got a few tonnes of GAC sitting at our off-site quarantine facility I think, so I may change out one of the rapid sand filter banks for GAC and see what happens. Will update if and when completed and I start to see results.

Regards,
AMC


AMC LSS is offline   Reply With Quote
Old 02/25/2015, 01:22 AM   #56
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,486
Hmm, isn't that a lot of carbon... Good luck!


__________________
Jonathan Bertoni
bertoni is offline   Reply With Quote
Old 05/31/2015, 07:33 PM   #57
rickyb
Registered Member
 
rickyb's Avatar
 
Join Date: Jan 2003
Location: Coppell, TX
Posts: 1,683
Any updates on how it turned out?


__________________
Reefaholic #9999889888777444899111558

Current Tank Info: 400G Custom Oceanic 72X36X36
rickyb is offline   Reply With Quote
Old 08/20/2015, 07:11 PM   #58
unze
Registered Member
 
Join Date: Oct 2011
Posts: 422
Quote:
Thanks, guys. I think Bertoni has probably hit the nail on the head, that it just isn't noticeable in smaller-scale systems. I really wanted to see if anyone else had experienced this with the same salt, before I tried to argue for switching back to the original brand - obviously, when you're making ~50,000 gallons of saltwater per week, even small differences in salt costs can add up.

I'm still convinced that it is some type of oxidation reaction occurring with something in the salt, as it mixes relatively clear, but turns greenish after aeration, and more greenish on exposure to ozone.

On the bright side, it seems like whatever it is is adsorbs effectively onto activated carbon - sent about fifteen thousand gallons to our water recovery tank yesterday and circulated it through GAC overnight, most of the green tint was gone by this morning. I've got a few tonnes of GAC sitting at our off-site quarantine facility I think, so I may change out one of the rapid sand filter banks for GAC and see what happens. Will update if and when completed and I start to see results.

Regards,
AMC
have you tested the blue treasurer salt for phosphates?? i did and it had po4.


unze is offline   Reply With Quote
Old 09/06/2016, 03:55 AM   #59
nanomania
Registered Member
 
nanomania's Avatar
 
Join Date: Mar 2011
Location: mumbai, india
Posts: 1,100
Too late to reply, but jus made a new reef setup using thus salt, and its currently the best value for money. I had got 2 bad batches of coral pro salt and had to throw away, coz the water wud turn milky and never cleared, had to drain full 50g twice. Bluetreasure mix cleared in like 1hr completely. Best salt ever.

Sent from my GT-N7100 using Tapatalk


__________________
TRY BUYING CAPTIVE BRED ANIMALS/FISHES/INVERTS...
DONT BUY A DOG, ADOPT THEM.....
SAVE NATURE.....
JUNGLES AND OCEANS RULE.....
nanomania is offline   Reply With Quote
Old 11/20/2018, 05:01 AM   #60
jestronix
Registered Member
 
jestronix's Avatar
 
Join Date: Apr 2009
Posts: 422
I've been using blue treasure with no issues. Used coral pro and always took ages to mix and left residue. Both have provided same results for my sps. then again quality control may be less on the cheaper brands


jestronix is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -6. The time now is 01:09 PM.


TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright 1999-2014
User Alert System provided by Advanced User Tagging v3.3.0 (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.