Substrate issues? Or something else?

Although we successfully use plastic containers, they must be kept very clean. Plastic tends to support the growth of a bacterial scum along the bottom and sides of the container. We have found that if this scum is not cleaned off periodically, the axolotls will develop sores on their toes and feet that will not heal. Instead the skin retreats up the leg and the toes eventually die and are sloughed off.

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RyRy said:

Has any one ever had issues with flourite substrates causing foot issues with a solitary axolotl? We have had our tank set up for about three months. The substrate is Seachem flourite black sand. The feet appear to be eroding away, toes, then digits go, then the foot. What else could cause this? Eating blood worms, and carnivore sinking pellets well.

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