Apparently (according to dr googly on the interweb thingy), water lettuce is allowed into California. However, it doesn't do well in aquariums especially if they have a cover. The water lettuce gets mouldy and rots. But it does well outdoors in ponds.
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There are several types of Vallis. Narrow Vallis is better than Giant Vallis.
Giant Vallis can reach 6ft long and has leaves about 1/2 to 1 inch wide. It likes cool water and tends to rot when put in aquariums.
Narrow Vallis can reach 3ft long but it normally only gets to 2 ft long in tanks. It's leaves are about 1/4 inch wide and it does well in most aquariums.
You can also get Twisted Vallis and Variegated Vallis, and both do ok in a tank but they like lots of light.
Vallis aren't that good at removing nitrates due to their slow growth in aquariums. Ambulia is a better choice, as are the Hygrophilas, (H. polysperma is the best for tanks), but most of the Hygrophilas are apparently illegal in California too. One would think considering the amount of pot that gets consumed in your state, they would have no issues with aquatic weed
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There are several types of Vallis. Narrow Vallis is better than Giant Vallis.
Giant Vallis can reach 6ft long and has leaves about 1/2 to 1 inch wide. It likes cool water and tends to rot when put in aquariums.
Narrow Vallis can reach 3ft long but it normally only gets to 2 ft long in tanks. It's leaves are about 1/4 inch wide and it does well in most aquariums.
You can also get Twisted Vallis and Variegated Vallis, and both do ok in a tank but they like lots of light.
Vallis aren't that good at removing nitrates due to their slow growth in aquariums. Ambulia is a better choice, as are the Hygrophilas, (H. polysperma is the best for tanks), but most of the Hygrophilas are apparently illegal in California too. One would think considering the amount of pot that gets consumed in your state, they would have no issues with aquatic weed