well, my latest adventure in regards to my tanks has been to get them all planted.
previously i have had no success in planting and tanks that have my goldies in them. they are far too destructive.
anyho, i have recently been ordering a lot of plants from various sites off the net, and i decided to give a few of them a go in my goldie's tank.
the tank itself is not incredibly light, so i guess these plants will also suit dim aqauriums!

Egeria/Elodea Densa (Goldfish weed)
Hygrophila Salicifolia (Willow Leaf Stricta)
Ludwigia Natans (Red And Green Ludwigia)
Myriophyllum Scabratum (Thick Green Leaved Mygrophyllum)
Hygro Poysperma
Myacca Fluviatillis

i have never had any luck with things like vallis', as the little devils just find them far too tempting!! lol!!

Good luck, Whats your lighting? And substrate? Any fertilizers?
Added CO2? (Flourish, Flourish excel, Root tabs ect? )

lol!!
okies,
i have a Co2 canister in the nursery tank, and i also add nutrafin plant fertaliser.
i have sand in the tank that i keep them in, and the lighting is at erm, 15watts i think.

onions work wonderfully with goldies... I have two, one in my 40 and one in my 10, which are doing great! wish i could say the same for my swords though...

Tinkerbell, if you don't mind me asking, where are you getting your plants on the internet??

tks!

is there a such things as a safe plant when goldfish are around...lol....how big to onion plants get and will they grow all over the tank from one plant?

i get my plants from greenline aquatics. they are very good!!

Onion plants become rather large. They usually grow over the surface of the water.

Heres a link for more info on the Onion plant. : http://www.kokosgoldfish.com/OnionPlant.html

-Alex

yes, Alex is right, they do grow to be very large. i have 2 at the moment, and they are taking over.
unless you have a very tall tank then i wouldnt reccomend them.