Foam, water parameters fine?
The last few days, I've been getting foaming on the top of my tank, along with a thinnish, very thinnish, film. Intense ripple, water parameters OK, CO2 injection normal (roughly 30); the only thing I've done recently is I've begun adding in Seachem's Stability, as a safeguard measure, having changed the bioload in the tank recently, and I added in a grouping of L. peruensis.
Any thoughts as to what this is? Fish are fine, eating, out and about, etc., plants growing very well.