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Setting up a 20g for a F8 Puffer

Posted: Fri Jan 17, 2020 7:20 pm
by iceicebaby93
I have a 20g freshwater tank that currently houses a number of fish that will soon be moving to a 36g freshwater bowfront. I have a juvenile figure 8 puffer that I am going to be moving to the 20g tank. Currently he is in my 15g freshwater tank as that's what he was in when I got him as well, but I know that F8's ultimately need brackish water, but I'm not sure what to do to get the 20g set up/changed to be ready for the puffer or if I need to change anything currently other than the water type. Can i do it all at once and drip acclimate him or do I add him and then increase the SG slowly? Also does it need to be cycled without fish for a bit after the freshwater fish are moved if I CAN do a quick change and then drip acclimate him, or can i just acclimate him since theres already a cycled filter in there?

How do i know the correct amount of salt to mix with the water so that it's the correct salinity since i know it's something you have to increase slowly?
Also a stupid question, how do you do water changes easily with brackish? i see F's like low end brackish, so say for example, 1.006-SG, do you just mix the water you're adding back in to that same SG and add it or will that double the SG? (sorry, dumb math question).

I have a HOB filter, that should still work right? I know F8's are notoriously messy but it will just be him in the 20g. I'm just feeling a little confused...I've read a bunch of articles and I thought I kind of understood but the more I read the more unsure I feel that I understand and will get things right! I guess I'm just feeling a little nervous and I want to make sure I do everything right for him! I made a list of things I need, can someone tell me if I'm missing anything/if you have recommendations for brands or specific items to get on that list that would be great too! Sorry for all the questions, I just want my little guy to be happy!

bucket for mixing saltwater
marine salt
refractometer/hydrometer (which is better/any suggestions on a specific one?)

Re: Setting up a 20g for a F8 Puffer

Posted: Fri Jan 17, 2020 9:51 pm
by Pufferpunk
[welcome]
I did post these 2 links for you on FB:
viewtopic.php?f=8&t=19348
library/puffers-in-focus/fig8/

HOB filter is fine, I prefer Aquaclears. Cheapest marine salt is good. I prefer a hydrometer but it must be calibrated with a calibration solution & checked every month or so.

You can remove the fish in there & then just acclimate in an hour.