Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Its ok

I recently bought the filter i find the 200 filter could hardy work good on my 27 gallon tank.I recommend to buy a cascade 300 filter on a 25 - 40 gallon tankI'm using the and every 5 days i have to change the filter and and do a 70 to 85 precent water change buy something better