Yes that would help, still the plecos arnt really the hardiest when cycling the tank .I wouldnt start testing shit and water changes just yet . Usually you do a 30% changee once a month .Sometimes you can more frequently like 10% weekly if you have alot of fish .But dont change it till the tank is done cycling which ususally take 4-6 weeks. You wouldnt have to test the tank till about 2 weeks . You mainly wanna focus on the ammonia , nitrate and nitrite .