Aquadur minerals for the GH
I missed this additive earlier, sorry. Don't use this. I've not seen it and need to look it up, but adjusting GH is not this simple, depending. The first thing is to ascertain the GH, KH and pH of your source (tap) water on its own. If you don't already know, you should be able to get this data from your water supplier, check their website. GH is crucial to fish, and once we know the source water parameters we will know which fish will be easier and which will be difficult or impossible.