
Originally Posted by
Omega
GE Silicone I and II, long used by fish- and frog-keepers and generally thought of to be aquarium safe, is probably no longer so. GE began using mildew inhibitors (Bioseal) recently in most their silicone products, even if the label says "100% silicone" and doesn't mention anything about mildew. According to an email from GE, all their silicone has trace amounts mildew inhibitors now except for the 1200.