Water circulation

[Marvroom]

I have read that Lake Tang tanks should have very light water flow in them. I have only a hang on the side filter on my 90 gallon and seems like there are "dead" areas of flow. Should I incorporate a powerhead to get more circulation or would it be too much for Tangs?

[danielratti]

You could add a powerhead to it. The do make smaller ones that are not much flow start there and see if they like it.

[Ron]

I have read that Lake Tang tanks should have very light water flow in them.

While not suggesting it's either right or wrong, what is that need based on?

^ The answer to that might help answer the original question. 

[nismo_sky28]

General rule of thumb for most cichlids is 8x10 gallons per hour of your tank volume. If you have dead spots I would add another filter before adding a power head.