Limescale formation in the combi storage tank

Hello esteemed construction experts!

Our single-family house has a combined storage tank (750 L), of which 200 L are allocated to the hot water tank. The energy sources are a wood stove, an electric heating element, and a solar system. The storage tank is used for the radiators and the hot water.
The 200 L hot water part of the combined storage tank is constantly being refilled with new water. Significant lime scale buildup is to be expected here, right? That should at least impede the temperature equalization between the two storage tanks.
To protect against lime scale formation, the solar systems and the electric heating element can only heat the water up to a maximum of 70 degrees Celsius, which is supposed to help... however, the wood stove can reach 90 degrees and more.
Question: Is it sensible/necessary to also regulate the heating by the stove to a maximum of 70 degrees? Does that really help with lime scale formation? Can someone tell me, in general, how I should proceed with the maintenance of a combined storage tank?

You should also limit the heating by the oven, otherwise the risk of limescale formation increases. However, the susceptibility to limescale formation depends not only on the water temperature but also on the design of the storage tank; for example, ribbed tube heat exchangers are less prone to limescale formation than plate heat exchangers. The water hardness is, of course, also important. Descaling may be necessary in cycles between one and five years - with very hard water, also in shorter cycles than annually. How often descaling actually needs to be performed should therefore be discussed with the plumber who also carries out the maintenance of your devices.

I would also reduce the temperature of the wood stove from 90 degrees at this point. The water hardness also plays a major role here. Maintenance should take place every 2 years. But with hard water, already after one year.

Lime scale is a tricky thing. In my opinion, it is not only due to the heat setting but also the water. I have a ribbed tube heat exchanger and I have to perform maintenance every year.

I also have a plate heat exchanger and can confirm that there is always rapid and heavy scale buildup. Maintenance is carried out every 18 months.

I have also had this experience and have always wondered where the rapid limescale formation comes from. Only when I turned down the oven did this limescale formation decrease. So it is also related to the temperature.