There's a thin white foam that has appeared at the top of my fish tank on the sides. I have a filter in my fish tank. Does this foam mean I need
![Can anyone tell me what this foam and white bubbles are? Perimeters are good so I don't know if it's harmful. Guppies just had babies not too long ago. : r/aquarium Can anyone tell me what this foam and white bubbles are? Perimeters are good so I don't know if it's harmful. Guppies just had babies not too long ago. : r/aquarium](https://i.redd.it/can-anyone-tell-me-what-this-foam-and-white-bubbles-are-v0-9hhs26f5ptz91.jpg?width=3024&format=pjpg&auto=webp&s=b098e10f65a7b3373e777521ca3a3efcf490d708)
Can anyone tell me what this foam and white bubbles are? Perimeters are good so I don't know if it's harmful. Guppies just had babies not too long ago. : r/aquarium
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