Ok. Newbie here that has been scouring all the posts about substrates and sand particularly Southdown Yardright and Old Castle. It has been becoming more obviouse to me that these items are no longer avaliable. Has anyone used just regular play sand ( i do have some Yardright White Play Sand not Tropical and failed the vinegar test) and has it, or will it work for use as a base sand about 2" deep and then add Carib Sea live sand over that maye 1" to 2" and then seed with a cup of known sand from an established (early thank you to Daire) tank. I did come across 1 post that the writer said he used regular brown play sand and had no problem with it. One post is not enough for me to decide it is ok, sorry. I really would like to not make a mistake, get all said and done and have to tear it back down for the wrong or sand that will cause problems. Some experts say silica in sand is ok, the SD has minimal PH bearing and so on. Anyway I don't need the sand quite yet but will in a few weeks be ready for that stage. So don't beat on me too badly for asking this question again as I see it does come up often.
Joe
Joe