Using Dolomite - The Planted Tank Forum
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post #1 of 107 (permalink) Old 05-29-2016, 06:17 PM Thread Starter
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Using Dolomite

So I have this stuff, and I wonder if it can be used as substrate alone or should it be mixed into a substrate. I have some in a jar of water now. It is small dark grey pellets.


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post #2 of 107 (permalink) Old 05-29-2016, 06:28 PM Thread Starter
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Forget using it as substrate alone...it dissolved into muddy brown water. So the gravel sized rock that is used in road construction would be a better choice for substrate. Aragonite and crushed coral is another way to go about this from what I've heard. But dosing an aquarium with the form pictured in the first post seems possible. Dirty, but possible.
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post #3 of 107 (permalink) Old 05-29-2016, 08:19 PM
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Be careful with the pellets as they are coated with a resin.
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post #4 of 107 (permalink) Old 05-29-2016, 08:24 PM
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It would make a great substrate supplement since it dissolves.


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post #5 of 107 (permalink) Old 05-29-2016, 08:30 PM
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I find that lime number terrifying for some reason. I have no idea what lime would even do in a tank environment. I've worked with this kind of stuff around the yard due to acidic soil and it's never pleasant. I've never used pellet form so maybe it isn't as bad, but the powder is awful.

I'm not here to tell you what to do. It does seem as though the all mighty miracle of Dolomite and the perfect formula to use is being kept secret. Crushed coral is easy. I have Aqua Clear HOB's, so I added a tiny amount to the 10 gallon in a filter bag and a slightly larger amount to the 29, also in a filter bag. If I didn't buy crushed coral, I would have bought substrate for cichlid tanks. It is made specifically to bolster pH and water hardness. It's also tank safe, so no fear of what might happen when something that typically is not found in a fish tank is introduced.

Good luck!
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post #6 of 107 (permalink) Old 05-29-2016, 08:43 PM Thread Starter
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I don't know what type of resin is used to coat these pellets, but I hope it's not poison to me or my fish and plants. I poured .5 cup (I wrote 1 cup earlier, but I read the lines on the jar wrong) of the muddy water into the 20 gallon planter pond. It was already at 7.6 pH. So will it go down or up with this stuff? Will the GH be off the charts? Will the KH go off the charts too? I suspect it will.




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Last edited by AWolf; 05-29-2016 at 09:58 PM. Reason: Changed amount to .5 cups (read lines on jar wrong)
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post #7 of 107 (permalink) Old 05-29-2016, 08:43 PM
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Ive used limestone in my cichlid tanks. The lime I used was large rocks from a limestone quarry that I used as decorations and caves, think Texas holey rock without the holes. The most notable effect, and the reason I used it, was a ph change from out of the tap at 7.8 to 8.6 in tank.

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post #8 of 107 (permalink) Old 05-29-2016, 08:48 PM
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I suspect greatly that your experiment will result in not only a rise in PH but the other mentioned GH and KH. Of course those plants could also die because of the resin coating. I'm sure the bag does not say what it is either.
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post #9 of 107 (permalink) Old 05-29-2016, 08:52 PM
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Quote:
Originally Posted by Goomie View Post
Be careful with the pellets as they are coated with a resin.
I was looking at the bag and missed that. I was wondering where this info comes from. Also if it doesnt harm terrestrial plants I wonder how much danger there really is to aquatic plants? If there is a resin coating then fish and inverts may be harmed but plants I have doubts. I tend to think the rise in ph, gh, and kh would be the bigger danger if overdosed.

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post #10 of 107 (permalink) Old 05-29-2016, 08:52 PM Thread Starter
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Quote:
Originally Posted by thedood View Post
Ive used limestone in my cichlid tanks. The lime I used was large rocks from a limestone quarry that I used as decorations and caves, think Texas holey rock without the holes. The most notable effect, and the reason I used it, was a ph change from out of the tap at 7.8 to 8.6 in tank.
Ouch, that is taking the pH in the wrong direction for my fish and plants, I think. My understanding is that plants do well in low pH, not high. I now have to consider using Baking Soda? Yuc, more stuff. But, didn't I see a lot of carbon in the analysis? Maybe that will keep this type of Lime from raising the pH too much. I need a chemistry tune-up.
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post #11 of 107 (permalink) Old 05-29-2016, 08:55 PM
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I think lime like this might be really useful to pre-charge kitty litter or safe-t-sorb.

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post #12 of 107 (permalink) Old 05-29-2016, 09:07 PM Thread Starter
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Originally Posted by thedood View Post
I think lime like this might be really useful to pre-charge kitty litter or safe-t-sorb.
Or coir (coconut husk/bark). Coir binds calcium from what I have read. I really don't know what the ramifications are from calcium binding substrates. Is it available to plant roots touching it? Would there be less calcium in the water column? Was the ratio mentioned in another post as important 4-1 mg/ca or ca/mg? I'll have to check.

It is 4:1 Ca:Mg according to other posts.

Last edited by AWolf; 05-29-2016 at 09:18 PM. Reason: Add Ratio
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post #13 of 107 (permalink) Old 05-29-2016, 09:14 PM
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Originally Posted by AWolf View Post
Or coir (coconut husk/bark). Coir binds calcium from what I have read. I really don't know what the ramifications are from calcium binding substrates. Is it available to plant roots touching it? Would there be less calcium in the water column? Was the ratio mentioned in another post as important 4-1 mg/ca or ca/mg? I'll have to check.
From what I gather and extrapolate is stability. I have read that Montmorillonite clay absorbs carbonates from the water column causing an initial kh and ph drop. Pre-charging it with dolomite would avoid that problem and give some system stability from the get go. I am going to be testing this theory on my next tank. I will be using cat litter as a bottom layer and will be pre-charging it with dolomite.

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post #14 of 107 (permalink) Old 05-29-2016, 09:38 PM Thread Starter
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You can see three layers as it settles. The planter pond is clearing up already.

I forgot to add the recipe:
2.5 cups water
.5 cups pellet
Stir
Pour .5 cups into 20 gallon pond and wait for all hell to break loose.


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post #15 of 107 (permalink) Old 05-29-2016, 09:48 PM Thread Starter
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Originally Posted by Smooch View Post
I find that lime number terrifying for some reason. I have no idea what lime would even do in a tank environment. I've worked with this kind of stuff around the yard due to acidic soil and it's never pleasant. I've never used pellet form so maybe it isn't as bad, but the powder is awful.

Good luck!
It stinks too. I can imagine you need a respirator when using the powder. I have no clue how this will turn out, but since I had the lime on hand and the subject came up...why not?
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