How long has the tank been setup with the soil, how deep is the soil and cap. Where did you get the plants, how do you have the rosette planted. Does the tank get any natural sunlight, if so what facing window. How far are the lights from the water and is there a partition between the lights and water.
Source water-do you know the pH, KH/GH, do you have a water softening unit on the house, if so, can you bypass it for the aquarium.
Can you post a pic...
OFL, here are the details:
Tank has been set up for about three weeks now. No natural sunlight. The room it's in has a northwest facing window with blinds that are always closed. Soil is approx 3 inches and cap is about 1 to 1-1/2" Plants were initially doing very well until I as(salt)ed them. The plants are from various places - Petsmart (swords, microswords, water onion, ludwigia), Petco (Hornwort), LFS (tiny stalk of anacharis, duckweed, frogbit, crypt spiralus, small stalk of water sprite which was weak when received), Walmart (Red Tiger Lotus bulbs, assorted bulbs). I tried planting the rosettes with the root tops above the water but they kept floating away, so the play sand is just above the top of the roots, but I think my KH and GH have more to do with their failure.
My water source is horrible, and there's no way around it - city water with GH and KH of 1-2 degrees. I believe pH is 6.8-7.0 but I should recheck. How do you win this soft/hard water battle? I've heard crushed coral and other techniques - do you have a preference or experience with this and/or what is the best way? I tried to contact API's troubleshooting team with no response. I'm not sure if I want to get into buffers and all of that, but if it's necessary, I'll take the plunge.
The lights are about 5-6 inches above the surface of the water with nothing between the water and the lights. I think
I had/have enough light, but added an additional 40W 6500k light. I figured this might help and brings wattage to about 4W/gallon, but of different color temps (Does this have a positive effect?). I keep about 25 gallons in this tank (104W/25G ~= 4W/G).
Here are some photos:
Aside from the bubble nest, it's a sad, sad scene in there.
The tank. - You can see the yellow color of the plants here.
Sword with parts of dead Hornwort at base
Water sprite (center), Microswords (left), Dead Hornwort (background)
Red Tiger Lotus, Crypt Spiralus
Big bubble nest! - about 2" x 3" and 1/2" thick. (I was pleasantly surprised to find this when I took these pictures last night.)