Status: Draft, published… You can consider this to be a review of an Espa SilenPlus 2M pool pump (and 1M and 3M), using the Evopool app. The pump has two functions: circulating water in the pool through the jet nozzles and filtering water through the sand filter. Combined with a chlorine unit, the pump has … Read more
The basic table for proper pool maintenance with in-depth explanations. The data table Minimum and maximum values in ppm – except for pH. Important notes Groups, steps The table contains three groups or steps: Topics, ingredients Salt or salinity Salt is the recycling medium for the production of chlorine. For concentration, always consult the chlorine … Read more
This post contains a table with materials for constructing light. You can sort the table! It contains composites like Dibond and Alubond (APA or AlPPAl) and it will probably grow in time. “C” means it is a Composite, so a fixed density is not available.
Please do not take this information for granted yet. It is a study in order to prepare and learn and I am asking for input before the stage of building, starting May 2021. This page probably will contain serious flaws at this point. I really appreciate input, feel free to leave a comment. General Usage: … Read more
When you add water to your pool, you also add dissolved calcium (and magnesium) carbonate. Adding hard water means adding a lot calcium carbonate. Water evaporates, the calcium carbonate, dissolved in it, does not. Your pool water gets harder and harder. In time there will be a point where there is simply too much calcium … Read more
This article allows you to make disinfectant yourself. Clean hands are one of the keys to not getting infected with COVID-19. What to do if you can’t get disinfectants like water and soap when you are on the way and alcohol based disinfectants are sold out? How do you make hand sanitizers yourself? There are … Read more
A page with substantiated pool facts, explanations and instructions without commercial interests. I could not find it on the internet and that is why I made this page. This page is intended to get a quick and good view of facets of swimming pool management, to reduce costs and to keep health aspects optimal. This … Read more
In general, minimal design is overvalued – contrary to rich design 😉 This is especially true for desktop environments with a multitude of controls. It does not mean that minimal design is always bad, read on. In this evaluation I use “Napoleon in St. Helena”, better known as “Freecell”. Here is a somewhat scientific but … Read more
A client, working in health care, had a special request: each working day she was filling in forms in a database with patient data. After the day was finished she wanted a back-up. In general, a back-up of an in use database is a bad idea. She was using Windows with a custom database application. … Read more
See: https://vanderworp.org/nl/lassen-aantekeningen/ (or automatic translation).