Any tips?

I'm in about the 4th or 5th week of flowering. Do I need to cut some fan leaves? Any tips on nutes. I'm using some bat guano every now and then. Not sure of the strain it was a bag seed

Don't cut off any fan leaves. Don't do anything. Just let it grow. The bat guano is good but don't get carried away. I am using Jamaican bat guano right now on my grow. Hit it with a little bit too much yesterday and it burned the tips of my OG kush plant. Not a big deal but it goes to show you gotta be careful. Other than that you don't need to pull any leaves. Some people do a week or so before they harvest but that is just to make it easier to trim. Your plant looks healthy. Leave it alone.

Are there any organic ferts I can use to increase the yield or potency of my plant?

Potency is genetics. If your dad had high blood pressure, more than likely you will too. All you can do is take meds to keep it in check. So chick ka de check yo self befor you wreck yo self!! Cause to much nutes ain't good fo yo health.

Its not wise to remove leaves. Removing leaves is like destroying warehouses where as a company would need to store product for sell for the continuous growth of the company. Without those warehouses and no place to store product would mean that production would have to slow down even possibly shut down. As to removing leaves which are the store places for nutrients can slow down the production of the plant. Also cutting on the plant can cause plant desease from open cuts and improper care. You are the stem your arms and legs are the leaves.