My cycling fish tank has a bit of foam and there's some brown substance in my substrate. Is it normal and what is it? - Quora
![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
![Why Are There Bubbles In My Fish Tank – 9 Reasons Why (and 7 Ways To Prevent it) - AquariumStoreDepot Why Are There Bubbles In My Fish Tank – 9 Reasons Why (and 7 Ways To Prevent it) - AquariumStoreDepot](https://aquariumstoredepot.com/wp-content/uploads/Why-Are-There-Bubbles-In-My-Fish-Tank.png)