Safe for Cories?? - The Planted Tank Forum
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post #1 of 11 (permalink) Old 12-20-2017, 09:22 PM Thread Starter
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Safe for Cories??

Hello. I will be setting up a 90-gallon tank and I plan on having cories and hillstream loaches. I will be having many plants so I will be putting about 2 inches of eco-complete.
Would this black sand be a good covering and good for the fish?
How many lbs of it should I get?
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post #2 of 11 (permalink) Old 12-20-2017, 09:29 PM
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I went with Sunset Gold by Caribsea instead because I read a few articles saying that black sand is too sharp for Corys but I am sure there are people who do keep them with black diamond blasting sand. My only complaint about the Tahitian Black sand (I have it in a small Betta tank) is that it left a gross black film on everything it touched. In the 2 gallon buckets I used to wash it I couldn't even get the black residue off with a bleach soak and it left a film on the glass of the aquarium (that I was able to wash off).


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post #3 of 11 (permalink) Old 12-20-2017, 09:37 PM Thread Starter
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Do you have any suggestions for a black sand that would work?
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post #4 of 11 (permalink) Old 12-20-2017, 09:43 PM
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Originally Posted by GustavoMoura View Post
Do you have any suggestions for a black sand that would work?
If you cap Eco with sand it wonít stay that way. The Eco will make its way to the surface. A cost effective black sand is Black Diamond blasting abrasive. You can pick it up from Tractor Supply for about $9 for 50lbs.

Just a noob


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post #5 of 11 (permalink) Old 12-20-2017, 09:43 PM
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Just so you know Eco-complete is far from complete and is fairly inert not unlike the sand you want to cap with. So if your adding that as a base layer thinking it will provide what the plants need, it won't and you'll have to dose the water column.
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post #6 of 11 (permalink) Old 12-20-2017, 09:47 PM Thread Starter
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So what do you guys suggest I do? I don't want to be fertilizing the plants all the time as it will be a low tech tank (I do not mind using root tabs). Are there any good substrates for cories that would also be great for plants?
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post #7 of 11 (permalink) Old 12-20-2017, 09:50 PM
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I just used sand it my low tech tank. Common low tech plants like Crypts, Anubias, Java fern or moss don't need much else. Ferts and Co2 will make them grow faster but they don't need it and in my experience do fine in sand.


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post #8 of 11 (permalink) Old 12-20-2017, 09:52 PM Thread Starter
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Will cories and hillstream loaches be fine in eco-complete?
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post #9 of 11 (permalink) Old 12-20-2017, 09:57 PM
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Low tech is a pretty broad term and it will depend also on the plants and light.

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I just used sand it my low tech tank. Common low tech plants like Crypts, Anubias, Java fern or moss don't need much else. Ferts and Co2 will make them grow faster but they don't need it and in my experience do fine in sand.
So are you saying those plants are growing from just water changes, fish waste/fish food?
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post #10 of 11 (permalink) Old 12-20-2017, 10:18 PM Thread Starter
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I will be having low tech plants in a 90-gallon tank. I have a Fluval fresh and plant 2.0. I will be having root tabs, Flourish and Flourish Excel. I plan on having cories. Which substrate should I get?
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post #11 of 11 (permalink) Old 12-20-2017, 11:18 PM
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Low tech is a pretty broad term and it will depend also on the plants and light.



So are you saying those plants are growing from just water changes, fish waste/fish food?
Yup. A bunch of the plants that are now in my high tech 36 gallon came from my 20 gallon low tech tank where they lived for 3 years. For most of those 3 years I did not fertilize. They consisted of C. wendtii 'Red', various species of Anubias, needle leaf Java fern, and Nymphoides 'Taiwan'. The needled leaf Java fern was moved to another low tech tank. The others a high tech tank where they obviously are growing much faster now (too fast in the case of the Nympoides!) but the point is for 3 years in a sand bottom tank and no ferts or other additions. The Anubias nana in particular completely colonized a piece of driftwood and I was able to take cuttings when I moved them and attach them to a new piece of driftwood.


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