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MikeS
02-24-2005, 03:02 AM
I have a few questions on silicates, and their impact on reef tanks...

Silicates are commonly blamed for diatom blooms, but I'd like to know a little more about the source of silicates in our tanks.

Obvioulsy, tap water is a potential contributer. But I've read threads on other forums that blame things like the silicone seals on the tank, and also even the glass itself. These make no sense to me...if this was the case, wouldn't the silicone seal and glass create a constant and ongoing diatom problem?


Along those same lines, what about silica sand? If used in a reef tank, would this be a source of silicates?

MikeS

MikeS
02-25-2005, 07:10 PM
Ok...did some hunting aroung and answered most of my quetions...

http://advancedaquarist.com/issues/jan2003/feature.htm

Interesting article...not sure how I missed it...

MikeS

dwall174
02-25-2005, 10:26 PM
Here's another article on Silica (http://www.gewater.com/library/tp/696_A_Study.jsp) that helps explain why it's not always removed by RO units.

Boomer
02-28-2005, 12:57 PM
dwall

What are you doing stealing my websites :D I was going to post that and Randy's article, no need now :lol:There is allot of info on that website. All that info comes from a Minnesota company Osmonics, where I live, which was recently but out by GE. It is mostly the DI that takes out the Si

dwall174
02-28-2005, 02:50 PM
dwall
What are you doing stealing my websites :D I was going to post that and Randy's article, no need now :lol:
Well technically I didn’t steal it because I believe it was you that gave it to me about a year ago on Randy’s Chemistry Forum! :D I’m still planning on getting the Hach Low Range Si-7 (http://www.hach.com/hc/search.product.details.invoker/PackagingCode=2255000/NewLinkLabel=Silica%2C+low+range+SI-7/PREVIOUS_BREADCRUMB_ID=HC_SEARCH_BROWSE_PRODUCTSil iciaLowRangeTestKits/SESSIONID|CE9UWXhPREE1T1RjeE5DWm5kV1Z6ZEZKWVdRPT1B MDlUTVRFdw==|) test kit that you & Randy have talked about before just so I can check the Si better.
It is mostly the DI that takes out the Si
BTW thanks to some type of silica/phosphorus acid that my city adds to our water supply to help control rust & corrosion this is what I can grow with regular RO water & a TDS of only 3

Boomer
02-28-2005, 03:44 PM
Well technically I didn’t steal

Well then, that means you actually read links I post :D, most don't

I don't think that algae is due to your RO water, more than likely the salt mix. It does not take much for diatoms to grow in a new tank, they are the pioneers. Granted, if the Si and PO4 where an absolute 0 ppm they would not grow at all.

dwall174
03-05-2005, 10:59 PM
I don't think that algae is due to your RO water, more than likely the salt mix. Well if I just use regular RO water instead of RO/DI water for my top-off I will get Diatoms in less than two days! As long as I use the DI it stays under control.
You could be right on the salt mix also!
I can’t remember where I read it, But I read an article a while back that talked about some of the salt manufactures using silicate based drying agents that can lead to diatom outbreaks. I have thought of trying Seachem’s Reef Salt™ (http://www.seachem.com/products/product_pages/Reefsalt.html) which is clamed to not use these drying agents! Another salt I have been checking into is Tropic Marin’s Pro-Reef (http://www.premiumaquatics.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=SALT-TM-200PR&Category_Code=Salt) They both are more $$ than IO! But if I didn’t have to add additives to raise the Ca, Mg, & Alk then it may be worth it!

Boomer
03-06-2005, 01:09 AM
Well, dwall lets put it this way. Randy uses IO and he ADDS Silica to his tank :D I used it for almost 30 years, so did Craig Bingman. I would not be using SeaChem, Randy and I have spoke of this often, it contains waaaaayyyyyyyy to much borate and is waaaaaay out of balance when comparing it to NSW. Tropic is a good salt.

Have you ever seen this, I know its kinda old.

The Composition Of Several Synthetic Seawater Mixes
http://web.archive.org/web/20030608135355/http://www.animalnetwork.com/fish2/aqfm/1999/mar/features/1/default.asp

dwall174
03-06-2005, 08:17 PM
Have you ever seen this, I know its kinda old.
The Composition Of Several Synthetic Seawater Mixes No I don't remember seeing that one! But I just added it to the stolen links list! :D

Randy uses IO and he ADDS Silica to his tank :D According to my city water report for last year my silica was as high as 21.44 mg/l average is about 12.40 mg/l so I don’t think I need to add any! :lol:

Thanks for the info! Looks as though I will just stay with my IO for now! At least I know what to add to it for my tank.

Boomer
03-07-2005, 12:58 AM
WOW, that is allot of silica d. What he heck are they adding to get it that high ?? Call and ask them for me :D

dwall174
03-07-2005, 02:41 AM
Well I don’t know what they call it but its some type of “Silica/Phosphorus Acid” that’s used to treat our water lines for rust & corrosion! Along with the high silica my tap water also has around 2.0~2.5 mg/l PO4, & SO4 of 31.2 mg/l.

"Lucky Me" I don't have any rust! :D