ECG Artifact Removal

I've been running into an issue trying to remove the ECG artifacts that have been showing up in a sub-set of the 16 channels. I wasn't sure what specific hardware settings would allow me to remove these ECG artifacts?

My setup is: (gain set to x4 for all)

CH1     bias-include     srb2-on

CH2     bias-include     srb2-on

CH3     bias-include     srb2-on

CH4     bias-include     srb2-on

CH5     bias-include     srb2-on

CH6     bias-include     srb2-on

CH7     bias-include     srb2-on

CH8     bias-include     srb2-on

CH9     bias-include     srb2-on

CH10     bias-include     srb2-on

CH11     bias-include     srb2-on

CH12     bias-include     srb2-on

CH13     bias-include     srb2-on

CH14     bias-include     srb2-on

CH15     bias-include     srb2-on

CH16     bias-include     srb2-on

Channels with ECG artifact e.g. are CH [4,5,8-12,16]

with channel 2 & 3 being the electrodes above the eyes

How might I for this example, configure my hardware settings to remove what I can of the ECG artifact from the data?

I should also mentioned that I did try in another test to use the srb1 pin (like in the tutorial connecting that pin to the wrist) in an attempt to remove the ECG signal from the rest of the channels with the ECG artifact present. This was done with me also not quite sure what the proper settings should be and if it would at all work.