If you have a large drip tray, having two locations that add water to it will help with more even distribution of water to your bio balls. Even if you don't have a large drip tray, this is a good idea, it will help your system be more efficient.
Your english is fine, let me know if I can be of any additional help...
Joel
Your english is fine, let me know if I can be of any additional help...
Joel