What chemical do you recomment to do an acid wash to clean everything out. I have been told do not use anything unless it says it is nickle safe on it. I have 4 A/C's all fed from one pump. Can I clean them all at the same time or should I do them one at a time?

Hello,

Thanks for the information. It's all very helpful.

Now I've some questions on the various "acids" recommended in these threads and others.

Are there any significant differences in the manufactured products: Rydlyme vs Barnacle Buster, or Star Brite's Mussel and barnacle remover? I've heard that Rydlyme is actually a caustic solution where Barnacle Buster is Phosphoric Acid, with Star Brite's product is another type of acid.

Can a non-specific product, i.e. bulk phosphoric acid from the paint store, or other caustics or acids be used?

Do the "pros" use one versus the other, that is manufactured product or bulk products?

The costs of the manufactured products seem high when compared to bulk products.

Thanks,

DIY