I have just recently swapped substrates from powdered white sand to a dark larger grained sand, i also used a layer of JBL fert substrate 2cm and at least 6 cms of sand. I thought the issue would resolve regarding rooting plants. The Corys appear to be the problem. There are plenty of Vallis (which are getting uprooted hourly), Swords (which are fine), Crypts (uprooted daily), some dwarf grasses (i wonder if someone could id these?) ? these are also getting uprooted. So, leads a no no what can i use?
