{"id":798,"date":"2024-03-31T14:11:58","date_gmt":"2024-03-31T12:11:58","guid":{"rendered":"https:\/\/invar.nl\/?p=798"},"modified":"2024-04-06T12:26:46","modified_gmt":"2024-04-06T10:26:46","slug":"continued-fertiliser-troubles","status":"publish","type":"post","link":"https:\/\/invar.nl\/?p=798","title":{"rendered":"Continued fertiliser troubles"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">V8.9 take 1<\/h2>\n\n\n\n<p>Mixing order:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>4.675 g calcium nitrate in about 90 mL water -&gt; dissolves fine<\/li>\n\n\n\n<li>6.273 g urea phoshate added -&gt; slightly milky, almost entirely dissolved?<\/li>\n\n\n\n<li>8.646 g ammonium sulfate -&gt; partially dissolved, very milky<\/li>\n\n\n\n<li>Water added to ~200mL -&gt; still very milky (250 mL would have been 500:1)<\/li>\n\n\n\n<li>Water added to ~400mL -&gt; still milky (500 mL would have been 250:1)<\/li>\n\n\n\n<li>Water added to ~800mL -&gt; still milky (1000 mL would have been 125:1)<\/li>\n<\/ul>\n\n\n\n<p>I guess I&#8217;m no longer getting calcium phosphate precipitate due to using urea phosphate, but I still get calcium sulfate precipitate.<\/p>\n\n\n\n<p>I guess I should&#8217;ve added the other salts first, to prevent calcium sulfate precipitation. With more nitrate in solution, there would be less chance for the calcium to bind with sulfate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V8.9 take 2<\/h2>\n\n\n\n<p>Mixing order: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>11.13 g potassium nitrate in about 90 mL water -&gt; takes a while to dissolve, but does dissolve ok<\/li>\n\n\n\n<li>2.334 g calcium nitrate added -&gt; dissolves ok<\/li>\n\n\n\n<li>2.635 g magnesium nitrate added -&gt; dissolves ok<\/li>\n\n\n\n<li>3.317 g urea phosphate added -&gt; dissolves ok, slightly milky but no precipitation after a minute<\/li>\n\n\n\n<li>Water to ~200 mL<\/li>\n\n\n\n<li>4.322 g ammonia sulfate -&gt; dissolves ok!! Very slightly milky but no precipitation after a minute<\/li>\n\n\n\n<li>0.935 g trace elements -&gt; formed some chunks, but after breaking up dissolved ok<\/li>\n<\/ul>\n\n\n\n<p><strong>Success!<\/strong> It&#8217;s only a 250:1 solution but at least there&#8217;s no precipitation any more. This is the most concentrated 1-part hydroponic fertiliser I&#8217;ve made so far.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V8.9 take 3<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>22.26 g potassium nitrate, 5 g calcium nitrate, 5.274 g magnesium nitrate in about 200 mL water -&gt; dissolves ok (I dropped half the calcium nitrate, put most back but added half a gram to compensate, ughh)<\/li>\n\n\n\n<li>6.273 g urea phosphate added -&gt; dissolves ok, slightly milky but no precipitation after a minute<\/li>\n\n\n\n<li>8.64 g ammonia sulfate -&gt; dissolves ok!! Very slightly milky but no precipitation after a minute<\/li>\n\n\n\n<li>1.872 g trace elements -&gt; again some small chunks but dissolves ok<\/li>\n<\/ul>\n\n\n\n<p>However, after a few minutes precipitation does start to form. 500:1 is too much, I guess 250:1 is the best I can do with this amount of sulfate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What&#8217;s next<\/h2>\n\n\n\n<p>250:1 is already nice, it&#8217;s more concentrated than GT Foliage Focus which is 150-200:1. However there are more concentrated products such as Canna Floragro and Dyna-Gro Foliage-Pro (both around 800:1). Liquid Gold Leaf (500:1) is the only one with significant amounts of sulfur, though &#8211; I wonder how they do that. Maybe a chelator.<\/p>\n\n\n\n<p>For V9 I will look at either lowering sulfate concentration to get to 500:1, or using a different form of sulfur. I could get some biosulfur (mostly S8), I wonder how soluble that is.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Edit<\/h2>\n\n\n\n<p>Shit, even the 250:1 eventually started precipitating out something. Probably calcium sulfate. Back to the drawing board.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>V8.9 take 1 Mixing order: I guess I&#8217;m no longer getting calcium phosphate precipitate due to using urea phosphate, but I still get calcium sulfate precipitate. I guess I should&#8217;ve added the other salts first, to prevent calcium sulfate precipitation. With more nitrate in solution, there would be less chance for the calcium to bind [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,6],"tags":[],"class_list":["post-798","post","type-post","status-publish","format-standard","hentry","category-fertiliser","category-houseplants-hydroponics"],"_links":{"self":[{"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts\/798","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=798"}],"version-history":[{"count":2,"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts\/798\/revisions"}],"predecessor-version":[{"id":802,"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts\/798\/revisions\/802"}],"wp:attachment":[{"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=798"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=798"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=798"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}