Pertinent info: 29 gallon tank. Fish added 2 1/2 weeks ago after cycling. Whisper filter (I think it's model 30). 25% water changed yesterday. Not vacuumed yet. Food - Tetra flakes and Aquadine flakes (No. 110, I think?)
My daughter's tank has 5 fish total in it. 2 fancy guppies, 2...