Which anode do you have if your on a river?

[SolentPhill]

From reading mc duff site if your in brackish water you Should use aluminium anodes, I'm on a river so it's a mix and when I spend few days at sea it's always salt water.

What do the fellow boaters use in places like hamble and cowes that must be brackish as well.

Can you have both on places like trim tabs.

 

[Trundlebug]

Never mix anode materials, they must all be the same.

I'm on the Trent (fresh) and go out to the Humber (brackish) or into the Wash (brackish) or East coast (salt). I fit aluminium anodes and they're fine.
Harder to obtain than either Mag or zinc, but if you check the internet you can find what you're looking for. Decent chandlers do stock them.

It does annoy me that the likes of MG Duff (who have an awful website) appear to have such a poor selection of aluminium anodes, yet they proclaim to have been going for years, be the biggest most experienced specialists with the widest range etc. It would seem in reality zinc is all they know, or are interested in.