Combining three tanks into one - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 01-15-2009, 06:35 PM Thread Starter
Algae Grower
PTrader: (0/0%)
Join Date: Sep 2007
Location: Va.
Posts: 33
Combining three tanks into one

I'm soon to combine my planted 10, 20 & 29. gallon tanks to my new 65 gallon tank.
My concern is that I will have to make the switch all at once because the new tank is going in the same place as the 29 gallon tank. I'm going to make the move without cycling the new tank. I plan on transferring all gravel, rocks, plants and filters to the new tank (fish also).
So the question is how much, if any, of a cycle will I have?
I also started a new canister filter that I'm running in the 29 gallon tank to pre-seed it for the transfer.
When I make this switch (in a couple of weeks) the new tank will have 5 "seasoned" filters running (till all is alright) and about 50% used tank water. I obviously will check all water parameters frequently.
Can anyone comment on the chances of success with this type of endeavor?
Thanks for any tips or ideas!


Six Planted Tanks: 55g 40g 29g 20g 14g 10g.
cosmiccow is offline  
Sponsored Links
post #2 of 3 (permalink) Old 01-15-2009, 06:53 PM
Planted Tank Enthusiast
susankat's Avatar
PTrader: (18/100%)
Join Date: Oct 2007
Location: Tulsa, Ok
Posts: 828
With all those filters it shouldn't be a problem. In a couple of weeks the canister should have enough bacteria to sustain all the fish.
susankat is offline  
post #3 of 3 (permalink) Old 01-15-2009, 07:22 PM
Planted Tank Guru
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,012
Used tank water isn't important. When we do big water changes we introduce new tap water in our tanks, and it works fine. The substrate in the new tank should go on top of a layer of mulm from existing tanks. That jump starts the bacteria in the substrate. Given that you are combining 3 tanks, you could put uncleaned substrate from one of the tanks as the lower layer in the new tank. That really does jump start it.

The plants and rocks will be covered with bacteria, so that gives you the primary start for the water in the new tank. Adding to that, the pre-cycled filter or filters, and I don't see you having any cycle occurring at all in the new tank.

I switched from a 29 gallon to a 45 gallon tank a couple of years ago, doing much as you are, and had no fish problems at all, so I know this works well.

Hoppy is offline  


Quick Reply

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome