Calcium silicate forms much more slowly than calcium carbonate, another type of scaling. Once it’s there, it’s nearly impossible to remove, as the crystalline matrix is much tighter and harder than calcium carbonate and may not even react to direct, undiluted acid application.

 

Even worse, if you have calcium silicate, there is a very good chance that you also have buildup in your pipes.

 

For a calcium silicate buildup. The most obvious option for this type of scaling is for the customer to cut their losses and resurface the pool.

 

If the customer is not in a position to re-surface the pool or would like other options,. The following control-only measures may be offered:

 

It’s important not to let calcium silicate build up or continue to build up for too long, as it will eventually damage your pipes and your filter.

 

You could use the same chemical and the same treatment approach as for calcium carbonate scaling; don't expect full or even partial eradication. What it may do is remove some surface scaling recently plated down

 

Consider adding a chemical sequestrant agent like Lo-Chlor Stain & Scale Defense, Lo-Chlor Aquaguard, or Riversands CalStop to retain the removed calcium in solution. This helps prevent the formation of new deposits and may even reduce existing ones.

 

Consider reducing pH and T.A. parameters closer to a fibreglass pool pH to 7.0 T.A. to a maximum of 80 ppm permenatly.

Reverse osmosis treatment can also be beneficial in preventing calcium buildup on pool surfaces.

 

Reverse osmosis is a process that removes impurities from water by passing it through a semipermeable membrane.
Regularly using reverse osmosis treatment can help remove excess calcium from the pool water, preventing buildup on pool surfaces.