I added some new plants to my new 20G tank that's been cycling for almost 4 week (and ammonia and nitrite just went down to zero today!) I have bacopa australis, bacopa carolina, luwigia repens, creeping jenny, brazilian pennywort, foxtail green, hornwort, varies anubis and moss, as well as some riccia floating (restricted to a corner) on top of the tank. Most of the plants are from planted aquarium central.
All the plants start showing signs of melting after a few days. Some of the plants are melting from the stems, especially the part of the stem that I buried under the substrate. So far, most of the bocopa have completely melted, the luwigia had lost most of its leaves and stem starting to turn black and rot, the brazilian pennywort is growing new leave but all the old leave and bottom of the steam are browning and melting with some of the new leaves starting to melt as well, the hornwort is growing longer but also experiencing melting at the same time as it grow. The creeping jenny seems to doing fine, some of its older leave melted but it's growing new leaves and looks healthy for now. The anubis and moss looks fine as well, but the riccia had turned yellow except for the tip.
I have 3-4 inch of eco-complete substrate, I added 4 seachem root tab to the tank before I add the plants, and I dose Flourish comp weekly and excel every other day. My nitrate level is around 20 PPM right now. I don't have a test kit for kh and gh, but I tested the water in petco and the alkalinity and hardness are both on the low end. The melting are especially worst this week when my nitrite and nitrate beginning to spike.
Anyone have suggestion on how to save my plants or anything I can do to make sure my plant can survive if I order some new ones?
So i proceed to clean my tank when I got home, most of the plants would just melt completely on the touch, so I end up taking out all the dying plants since there were dead plant floating everywhere in my tank after the stir up. After a 50% water change, there are still lots of dead plant pieces floating around but I will just let them settle and suck up by the filter. At the end, all the luwigia, bocopa, and pennywort are now gone, the hornwort is still alive but the whole plant is yellowing and small leaves are falling apart, most of the leaves on the foxtail turned black and fall easily so they are just a bare stem now. Even my anubis nana lost 4 of the 7 leaves (the leaves were very loose and came off when I take it out of water, but the leaves look perfectly healthy, it just fallen off the rhizome). The only plants that seem to be in great condition is the creeping jenny (despite a few melting leaves at the bottom), and the moss stones that I made.
I been doing some reading, am I think my kh and gh might be the reason for some of the plants dying. I have very soft tap water, and I bought my water to petco for a water test, the gh/kh reading was below 2, is this too low for a planted tank? Would this explain for all the meltings? If so, what are some safe way to raise my kh and gh?
Last edited by Darkblade48; 05-20-2018 at 10:30 PM.
Reason: Please use the edit function for back to back posts to keep threads cleaner