Adding Eco Complete to Existing Aquarium? - The Planted Tank Forum
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post #1 of 11 (permalink) Old 10-30-2018, 12:50 AM Thread Starter
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Adding Eco Complete to Existing Aquarium?

A Family member would like to add Eco Complete to the gravel in the goldfish tank for a mixed substrate. Is it OK to add this product with the 3 small goldfish in their 46 gallon bow front, or would this be detrimental to the fish? In other words, do the goldfish need to be removed in order to use the Eco Complete? Apologies if this is a foolish question, but I have not used this product before, and am not sure if an ammonia spike/mini cycle will occur.
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post #2 of 11 (permalink) Old 10-30-2018, 04:50 PM
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It can be rinsed and added without issue, it's an inert substrate, so nothing is going to leech into the water and harm the fauna like how aquasoil leeches ammonia for a time.

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post #3 of 11 (permalink) Old 10-30-2018, 07:50 PM
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I had no issues when I added it to my old tank. I did end up removing the fauna though as I was removing an old under gravel filter along with the old gravel, so I wanted to minimize exposure to any nasty gas coming up. No ammonia spikes were observed.
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post #4 of 11 (permalink) Old 11-01-2018, 04:48 PM Thread Starter
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Thanks! The Eco Complete has been added. I guess I should start a tank journal.
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post #5 of 11 (permalink) Old 11-01-2018, 05:04 PM
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Make sure monitor for ammonia spike. Anytime you change out gravel there is the chance will go through mini-cycle.

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post #6 of 11 (permalink) Old 11-01-2018, 05:08 PM
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If your simply adding an inert substrate to the existing one you don't have to worry about the cycle.
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post #7 of 11 (permalink) Old 11-01-2018, 05:16 PM
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You can most certainly get an ammonia spike from changing out gravel. The issue is not if the substrate is inert or not, it is that you are taking out a substantial portion of your beneficial bacteria from your system. It will take time for this colony to again grow to match bio-load. Especially if your tank is newly established.

180 g. low tech w/ wild South American cichlids, corydoras eques, and African Congo riverine tetras.
60 g. low tech w/ F1 Alenquer discus pair and wild Altum Angels
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30 g. low-tech Shrimp tank - wild-type neocaradina and Caridina cf. babaulti "Zebra"
9 gallon Shrimp tank- Caridina cantonensis ("Golden Bee's"). *Tank still at cycling stage.

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post #8 of 11 (permalink) Old 11-01-2018, 05:40 PM
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Based on OP no one is changing out gravel. Read the thread!
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post #9 of 11 (permalink) Old 11-01-2018, 05:43 PM
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Quote:
Originally Posted by snakeybird View Post
Thanks! The Eco Complete has been added. I guess I should start a tank journal.

Always have a tank journal 🙂

My tank journal.

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post #10 of 11 (permalink) Old 11-02-2018, 08:00 PM Thread Starter
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None of the original gravel was removed. The Eco Complete was added to the existing gravel, and the two were hand mixed together. The aquarium was recently set up, and a sponge filter is in use for extra bacteria back up (I took the cannister filter off prior to adding the new substrate, as I was concerned particulates might damage it). Additionally, at this point the 3 goldfish are still pretty small in 46 gallons, and weekly water changes occur, as the tank owner is well aware they are messy fish.

The photo is directly prior to adding Eco Complete; tank clouded up a bit, and I have not visited since to take an updated photo. Additionally, an LED light replaced the old T-8 fluorescent fixture in the photo.

I have some gel caps filled with Osmocote + for the sword Ozelot and Red Flame swrd plants. I have not used them before, so it will be interesting to see what happens.
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post #11 of 11 (permalink) Old 11-10-2018, 04:50 PM Thread Starter
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As an update to the original post, it is 10 days post mixing the eco complete with the existing aquarium gravel; no spike in ammonia has been observed. I am updating just in case someone else has the same question at some point, and comes across this thread.
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