I was asking about the chaeto in the tank and Do this project ????

what do u think about that ... is it ok or something i have to develop ...

 

I believe you are on the right track but the container probably needs more holes to allow flow.

 

I concur, drill or punch a bunch more holes in it and aim a powerhead at it for better flow.

Hope it works out for you.

 

thanks .... how many days i can check nitrates again for change take effect ???

 

A reduction in nitrates will not happen in days, chaeto is not a magical cure, over time it will help but not immediately.

To reduce nitrates you will still have to use RO/DI water, not over feed and do routine water changes.

Maybe you need to be looking at an Algae Turf Scrubber (ATS).