Med to very large tank

[wentzville]

My sister-in-law just gave me her 125 gal tank set up. It's been sitting in her basement empty for 10 years. I have 2 tanks now 30gal and 15 gal.If I add my rocks, gravel, water, plants and use my filters from both my tanks will I have a cycle problem with the 70 gals of new water? Man ,it's been years since I started a new tank.

 

[Zagz]

The water from your old tank will hold very little bacterial culture. With the substrate, filters and plants you should have a much faster cycle. You will not get an instant cycle IMO as the volume of your new tank is so much larger than your old tanks. But you should have a fairly fast cycle.

Congrats on the fantastic new tank and WELCOME TO AA!!!!!!!!

 

[revhtree]

Also make sure to fill it up outside and let it sit for a day or two to check for any leaks. With it sitting around that long, the silicone may need to be replaced.

 

[wentzville]

Thanks. How about I get my water from a spring fed river. Thats where I get my fish and my rocks. Its as clear as drinking water.

 

[Zagz]

Water contains very little bacteria in it. Substrate and filter media contain the majority. So getting river water will not substantially speed up your cycle.