I am now on my 4th java fern. I just can't keep these things alive!! I have had them attached to driftwood and to large rocks, never in the substrate. All other plants seem to do just fine. 110wt over a 55gl tank. Flourish once per week added to the tank although, I have tried it as much as twice per week and it still does no good. 0 Ammonia, 0 nitrite, 10 nitrate and Co2 via DIY yeast. Any ideas?