How much substrate depth is necessary for macroalgae?

[DrHank]

I'm sure that it depends on type to some extent but generally speaking, what sand bed depth would you folks recommend for macroalgae to do well?

 

[Samala]

For macroalgae, like perhaps those that grow on rhizoid tissue like Caulerpa you need only enough substrate to weight them down until the root-like tissue has grown in. I would say 1" or so would be fine. I've grown several Caulerpa species like this.. however, they do not absolutely need substrate.

For Udotea, Penicillus, Halimeda in the sandbed, I might be inclined to give them a little more sand to root in.

>Sarah

 

[DrHank]

Thanks. So if I understand correctly, a DSB isn't really necessary. I'm somewhat averse to a DSB in the display as I would not really want to develop anerobic pockets in the substrate which might be disturbed. Since you were kind enough to answer this question I'd like to ask you another if you don't mind. I posted another thread regarding how much C. Prolifera was too much. Being new to macroalgae (which I am) my primary concern is what negative effects can occur if this Calurpa were to grow too much in my display tank. Also, how much is too much? I'm really after a plesant aquarium that is primarily fish oriented. Also, I'm hoping to develop an easily managable one where the inhabitants peacefully co-exist. I don't want too many corals, too many plants, too many inverts, or too many fish. I value your opinion as you appear to know of what you speak. Thanks!!

 

[Ocean Drive]

Caulerpa sp. becomes dangerous when you switch on light for 24 hours, in this way can be obtained a collapse with toxin release, caulerpinina and caulerpicina, also inhibiting for the increase of corals. All macroalgae needs of the dark period. Caulerpa is much dangerous one also when it grows so much and it arrives on the surface of the water where the tips of the leafs turns white.
Ciao