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Old 03-27-2020, 12:13 PM   #1
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Mistakes were made

A few weeks ago I set up a new 20 gallon tank. the plan was to move the fish I had in a 5 gallon hex tank (has been running for about a year). That tank was overstocked and I had been having trouble with the PH being low. I was hoping that things would be easier to manage in a larger tank.

The new tank is 20 Gallon High, and came with a quietflow 10 HOB filter and a preset heater (78 degrees). I added api stress zyme and tetra safe start and aqua safe. I also added a small sponge filter in addition to the HOB.

About a week after I set it up, I jumped the gun and started adding fish to the tank. over the course of a couple weeks I added 5 platy, 1 molly, 2 peppered cory cats, 1 bristle nose pleco and 8 neon tetras. eventually it was the tetras that tipped things over the edge.

This caused a bad ammonia spike, and triggered a really bad ich infestation. I suspect the ich came in with the tetras as well. first symptoms in the tank were faded colors on the neons and the molly started having trouble swimming.

I added a bag of ammo chips and ammonia neutralizer. Then started API super ick cure. continued this with daily 25% water changes.

The neon's were the first to go. all 8 died over about 3 days. then pleco, and then the platys all about 1-2 fish each day.

that brings us up to now. The tank parameters have all returned to normal. temp 78, PH 6.8, Ammonia 0, nitrates and nitrites 0. I put the charcoal back in the filter. As near as I can tell the 2 corys (only thing in the tank now) are doing ok.

I am looking for some advice on how I should proceed at this point.
I have set up a small quarantine tank (5 gallon) that I primed with water and the sponge filter from the 5 gallon hex tank. and has been running for over a week.

should I move the corys to the quarantine and then break the 20 gallon down and start over?

or should I just wait it out, leave the corys in the 20 gallon? if so how long would be good to wait before adding anything else to that tank?

Sorry for the long rambling post, and thanks in advance for any suggestions.
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Old 03-27-2020, 01:56 PM   #2
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At this point, I see nothing to be gained by moving the cories to the smaller tank. If the tank parameters have stabilized, then you're just making more work for yourself in having this other tank going too. Has the ich been fully dealt with or do the cories still have spots?

It seems as if the 20 gal, from those parameters you listed, is not cycled. Do not add any more fish to it until it is. When you do get the tank cycled add the fish slowly next time. A couple these, wait a few weeks, add a couple of those, wait, etc. Quarantine any new fish you bring in in the hospital/Quarantine tank while the main tank adjusts to the additional bioload.

Do you know the process for cycling a tank with fish already in it? If not there are articles on this site to help you along.
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Old 03-27-2020, 02:26 PM   #3
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Originally Posted by Skai View Post
. Has the ich been fully dealt with or do the cories still have spots?
The Ich seems to be gone. The Corys don't have any sign of the spots.


Thanks for your reply. I appreciate the info.
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Old 03-27-2020, 02:57 PM   #4
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No problem, if you have any other questions feel free to ask
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Old 03-29-2020, 01:57 AM   #5
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Is the original filter still running on the hex tank? You could move it over, or that was the filter you used when you set up the 20G?

this article has 2 links for the fish in tank cycling plus lots of useful information
https://www.aquariumadvice.com/guide...ater-aquarium/


This should help you get an understanding of the fishless process (just so you know)
https://www.aquariumadvice.com/the-a...hless-cycling/
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