DankieDoodle

<span class="link_user">@Mia_BIOTABS</span>, Thanks mate :raised_hands: Yeah, Autopot + BioTabs really is a cheat code :smile: I’m running a true “just add water” setup, designed specifically for bottom-fed Autopots and long, stable organic runs. :wrench: Setup 3 × 15 L Autopots with AirBase Effective substrate volume: ~43 L :seedling: Substrate Mix (total amounts) Coco Perlite 70/30 – 22.5 L Lightmix – 10.5 L Worm humus – 5.25 L Zeolite (0.5–1 mm) – 2.7 L Vermiculite (2–4 mm) – 1.2 L :heavy_plus_sign: Amendments BioTabs – 2 tabs per pot Startrex – 3–4 tbsp (~80 g) Silicium Flash – 2–3 tbsp (~50–60 g) Mycorrhiza + Trichoderma – 1–2 g per planting hole :droplet: Water & Ca:Mg Balance Epsom salt (MgSO₄·7H₂O) – 0.15 g per L of water (used only when moistening the mix) Why Mg / Ca:Mg ratio: After checking my tap water analysis, calcium levels are relatively high while magnesium is quite low. For coco-based organic substrates, a Ca:Mg ratio of around 3:1 to 4:1 is ideal for steady nutrient uptake. Adding a small dose of magnesium (Epsom salt) corrects that imbalance and keeps chlorophyll production, aroma development, and nutrient flow consistent throughout the run. :brain: Why this setup works Highly oxygenated root zone (Coco/Perlite + AirBase) Consistent moisture without waterlogging (Autopot capillary feed) Buffered pH and nutrient release (Zeolite + Humus) Enhanced microbial activity from day one (Startrex + Mycorrhiza + Trichoderma) Fully compatible with the “water-only” Autopot strategy I let the mix rest 12–24 h before planting so the microbes activate and the medium stabilizes. After that, it’s literally water only in the reservoir :droplet: Perfect for long photoperiod runs – and works great with autos too. Happy growing :herb::fire: