This reader also have failed in keeping HC crawling on substrate. I realise that HC needs to root to something before they can start to creep. The driftwood or rochs that they come tied onto does not give the roots any place to grow into, and in time, the sod will become dislodged IME.
HC needs lots of light, fert and CO2, I'm told.
I've made this observation: a 50cent sod of HC left floating on the surface of my high tec tank, can grow to cover the area the size of 2 $2 bills in the span of 1 month. But this same tank, cannot grow any HC on the gravel without it getting yellow, and dislodged from the planting (I've tried inserting individual stems into the gravel as well as planting whole sods with the earth into the gravel).
I believe this tank has sufficient light (2 x 36W D-80K PLL or 11 WPG), sufficient temp 25deg C, sufficient fert both in water (as the floating HC grow so quickly) and in substrate (Ferka, root monsters, laterite,) and certainly CO2 can't be deficient (4dkH, 6pH = 120ppm).
In truth, I've been able to get HC to crawl on the substrate BUT ONLY when I grow them outdoors in direct sunlight under 2-inches of water. In this case, grown on only ADA amazonia, It creeps and covers the gravel within a month. No CO2 added, only dose KNO3 generously in the 2nd half of the month as the urea in the aquasoil wears off and the leaves start to yellow. Water temperature can hit a hot 40deg C or more (Thermometer range exceeded) at mid day, and the HC is bubbling away!
But when I transplant the sods complete with soil into my high tec tank, they don't adapt and will yellow and float within the month.
So what gives? Perhaps other readers who have been unsuccessful like me can share your experiences too so we can know what not to try. I find that HC is just too enigmatic. Those who succeed say it needs high light, heavy feeding and CO2. Others (like tropica claim it makes few demands) and I can see that in my outdoor puddle of water in the sun. So what's the real HC's requirements?
Apologies for the lengthyness.
Warm regards,
Lawrence Lee
brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable--if anything is excellent or praiseworthy--think about such things.
Philippians 4:8
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