I want to convert my goldfish tank to a tropical tank help with this? - The Planted Tank Forum
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post #1 of 4 (permalink) Old 06-27-2012, 11:50 PM Thread Starter
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I want to convert my goldfish tank to a tropical tank help with this?

I want to change my goldfish tank to a tropical tank but I heard there's complications to this?
I plan on taking out all the water from the goldfish tank and putting in new treated water
Can I still keep the media from the goldfish tank to seed the tank??
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post #2 of 4 (permalink) Old 06-28-2012, 12:13 AM
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I don't see why not. As long as you keep the filter media wet, it should be fine. That's all I did. You just need to
make sure you get a heater and you'll be good.
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post #3 of 4 (permalink) Old 06-28-2012, 12:17 AM
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Do you still have the Goldfish?
If so, then they are keeping the nitrifying bacteria fed with the ammonia they produce.

If you change the tank decor, plant it, raise the temperature and turn it into a more tropical tank the bacteria will be fine, as long as you keep feeding them through the change. You could change it all over in just a short time, an hour to a couple of hours, depending on the size of the tank. But don't raise the temperature that fast with the Golds still in there. A degree or two per day is safe. More might be OK, or might not. Fancy Golds are fine with temperature into the mid 70sF. Comets and similar Golds are better not higher than the low 70sF.

If you have already removed the Golds, then keep feeding the bacteria with ammonia while you are waiting to make the change. If you add enough ammonia to read 3 ppm once a day the bacteria colony will be in fine shape when you are ready to add tropical fish.

There are a fair amount of nitrifying bacteria that live on other surfaces (besides the filter media) such as on the substrate, and other decor. If you are getting rid of these items then the filter will be the only source of bio filter for a while. Again, feed these bacteria just like doing a fishless cycle and the population will increase very quickly.
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post #4 of 4 (permalink) Old 06-28-2012, 01:20 AM Thread Starter
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Thanks for all the info really helped
And yes the goldfish are still in so I guess they'll feed the bacteria while I change the substrate to floramax and add the heater in and turn it up slowly
I'll make a thread on it
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