Filter for Betta
I was reading in regards to the basic necessities for Bettas and I have met all but the ph level and alkalinty levels as well as a light filter. I have been trying to find information on a brand of filter. I would normally go in and ask the petstore staff for that information, but as soon as I mention that I have a betta, they immediately tell me that I can't put a filter in. The betta resides in a 10 gallon tank with three cory catfish, is there a particular brand of filter that has a low flow that someone can recommend?
I am planning on heading to the pet store and picking up a Ph decreaser to bring the ph level down to a more acceptable level for the betta, so that will take care of that issue.
Any help or advice in this regard would be greatly appreciated