BDBS in lo iron tanks: glass scratching? - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 10-01-2018, 02:26 AM Thread Starter
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Question BDBS in lo iron tanks: glass scratching?

I am considering using BDBS for the first time but worried about scratching low iron glass. It is a blasting sand, after all.

Any good / bad long term experience in this area? Thanks!
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post #2 of 4 (permalink) Old 10-01-2018, 05:46 PM
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I have been using it for over a year with a regular glass tank and have even got pieces hung under my magnetic scraper as drug it a ways before breaking the connection and letting the piece fall out. Although there could be some micro scratches I cannot tell. I have also ran the razor scraper down into the stuff to get below the substrate in the front. No probs.


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post #3 of 4 (permalink) Old 10-06-2018, 11:50 PM
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I run BDSD in all my tank except my low iron rimless for the exact same reasoning. Only tank I have ever scratched was my Spec V because a snail had sand attached to its foot... So, 5 tanks with BDSD and one scratch that I know of in a couple of years since switching everything over.
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post #4 of 4 (permalink) Old 10-07-2018, 06:42 AM
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I've not seen any obvious scratching in my Mr. Aqua low-iron tank but looks like it's possible. Black Diamond lists the Moh's hardness at 6-7. Glass depending on type typically would be in the range of 5.5-7. Low-iron glass appears generally to be toward the middle vs higher end of that. So worst case given those ranges, yes, it could scratch it. Best case at an equal hardness of 7 against 7 then probably so if you really tried. Quartz and silica sand also look to be in the same 6-7 Moh's range so not much difference. One other aspect is that BDBS tends to be more angular in particle shape so I suppose that might make it potentially a little more likely than some other more rounded/polished sand types.
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