I've read articles saying it’s a must and others that it’s not necessary for 10 gal as long as your filter is making movement. The gal at Petco said to buy this fancy smancy bubbler (pic attached) for my 10 gal. Idk, but it looks like way too much bubbles for a 10 gallon so I think she might of been wrong on the size. Can you help? Do I need a bubbler, or is this fancy bubbler fine.