I just cant figure out whats the problem with my freshwater aquarium plants,THEY DONT GROW.I have 3 t5ho 54watt 48inch 2grow and 1 bloom lightning,100 gallons of aquarium 17inch high,60inch long,21inch widht.I dont have relfector but i use mylar.Now i began to find out that cabomba is becoming very soft,and light yellow.I tried to move it and it easly brake into peaces.I use this KENT pro liquif fertilizer.PLEASE if you can help me with any information that will be great.

Are you planting directly under the lights? Cabomba can be picky if it doesn't get a good amount. Another thing is why don't you have reflectors? Was this some type of budget build? I would go to AHSupply.com and buy them. The biggest thing that most T5HO lighting has going for it is the reflectors and how efficient they make they light get so much more out of it.

What Kelvin rating bulbs are you using?

Do you dose Co2? If so diy or pressurized? If Diy how big of a bottle do you use, whats your ingredients?

With that much light and not enough Co2 it might be a deficiency in carbon available to your plants to grow and everything on earth needs carbon.

I love the way cabomba looks! I've never been able to get it to properly root and grow/stay thick though. I'm no expert, but, I think it's your lighting. Also try CO2. Even a DIY system will work well. I have a thread here on a simple one.

Also, make sure you keep the current down where you're trying to grow it. I also believe soft water is needed for these beauties.

So...
1. Reflector/lighting fix
2. CO2
3. Low Current
4. Soft-ish water

Keep us posted!

__________________
"May I never wake from the American Dream."
-Carrie Latet

60 gallon
5 Orange/Sunburst Platy
1 Angelfish
1 Silver Tip Tetra
2 Glass Catfish
4 Zebra Long Fin Danios
2 Siamese Algae Eaters (SAE)
2 Amano Shrimp
2 Fancy? Tetras
1 Green/Ghost pleco
Hygrophila angustifolia
Anacharis
Swords: 1 Melon, 1 Amazon, 1 Rose
Micro Sword
Moneywort
Rotala nanjenshan
Anubias barteri/Broad Leaf
Brazillian Pennywort

and some I forgot the species of...

What's the word? Any success?

__________________
"May I never wake from the American Dream."
-Carrie Latet

60 gallon
5 Orange/Sunburst Platy
1 Angelfish
1 Silver Tip Tetra
2 Glass Catfish
4 Zebra Long Fin Danios
2 Siamese Algae Eaters (SAE)
2 Amano Shrimp
2 Fancy? Tetras
1 Green/Ghost pleco
Hygrophila angustifolia
Anacharis
Swords: 1 Melon, 1 Amazon, 1 Rose
Micro Sword
Moneywort
Rotala nanjenshan
Anubias barteri/Broad Leaf
Brazillian Pennywort

and some I forgot the species of...

no one has mentioned ferts??? whats in your liquid fertilizer? is it just micros or does it have macros too?