help: plants rotting roots

[slvrcvc]

you can refer to this pic of my tanks at 2weeks old

http://www.aquariacentral.com/forums/showthread.php?t=33304

all my hyrophilia and cambomba and anarachis died from rotting from the bottom up as of yesterday i just had to to totally pull them out and give up on them.

all I know there is something wrong but dont know the exact cause. The camboma started to turn brown on the upper parts of the plant and when i threw it away yesterday i found out it was some sort of growth on the fine leaves of it. so i had to do a 60% water change to clear the scum out.

also the hygro was steadily rotting from the bottom up, actually all of them were

also there is increased green spot algae on glass and all broad leaf plants. green hair algae on driftwood steadlily multiplying.

so far only plan i have is to buy more to replace it and not add any ferts at all for 1 month.

any ideas or suggestions?

p.s. also i found 2 lead weitghs i forgot to remove or it fell off and landed in the substrate ...can lead poisoning do this???. the lead seemed to be "worn out" like it was decompsoing or somehting

also i hardly add TMG as it is trace and i havent started adding any macros. the co2 liquid i add every other day and keep it at 6.8-7.0 pH with 12-15ppm carbon

sry for all spelling and grammar errors im at work tryin to type this fast

 

[djlen]

The problems with die-off at the bases can be traced back to two possibilities. Not enough light penetrating to them is probably the cause, but also, it sounds like it's time to start fertilizing all elements lightly.
They are hungry and not growing well. This contributes to the green spot and other algae increase.
Once you replace them, you will need to start dosing the Macros and Traces regularly to get them growing well. It's a fairly deep tank with only a 2.0 - 2.25watts/gal., but Hygro. should be able to grow in that tank, fairly well.

Please reply with fish load, and numbers on P and N within the tank and also out of the tap(after setting out over night). If you don't have these test kits, you will need them now and especially once you start dosing.
Have you considered CO2 injection? It would help although not a must for your tank, IMO.

Len