My understanding is that most cement colouring powders contain a lot of iron oxide. In fact, my local hardware store stocks only the oxide powders. Should Darksoul and others be wary of how these powders would affect their water chemistry? Or are there powders not made from iron oxide?
Either way, I imagine this prob can be overcome by using pond sealant or similar.
B
Either way, I imagine this prob can be overcome by using pond sealant or similar.
B
