4eye wrote:Thanks for the pointers with the rotala, why is egeria illigal , does it grow in your water systems there?
Yes it does - and well. We have a lot of unique flora and fauna that can't compete with strong growing species like Egeria. It causes problems in a number of rivers by taking over, including the one that runs through my own town. People have drowned after getting caught in its fronds and it clogs the waterway requiring constant, and expensive, mowing by specialist machinery.
Most outbreaks of it have been caused by aquarists emptying their aquaria into the waterways
Having said that, my pond has the illegal stuff (I did not realise it at the time) as I collected it from a park in town. When I cleaned out the pond I made sure the removed plants were composted. A friend wanted some but I said no as she lives in an area which periodically floods. Plant from her pond would end up in another, so far Egeria free, waterway as a result.