How much to baffle?

[RackinRocky]

I have Penguin HOB filters. I have rubber banded the Fluval Pre Filters to the output because I have a betta in each tank. I know bettas prefer very little curren, and I've seen them struggle a bit with it. Well, my question is, how can I know what is too much baffle, and what is not enough? I have a few bubbles with the baffling, but they are very few. Will the tank (which includes other fish) get enough surface agitation?

 

[gab_attack]

I'm not too familiar with the penguin hob filters but when I was running a top find hob on my 5.5 gallon tank I used a piece of water bottle to baffle it. I just cut off the ends and then cut a single line down the middle of the remaining piece, then stuck it over the area where the water flows back into the water. It helped distribute the flow. I also switched the media and put a bunch more filter floss to slow down the water. Worked for me until I decided to switch to internal filters.

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