水草情迷

草缸是否真的不可用底喉? 用底喉或隔屎板的影嚮在那呢?

It is a never ending debatable question, some say it is good for plants, some say it will wash away the nutrients......

But one practical concern is, the UGF is very hard to clean especially if clogged.

Agree with JJK, If the fish population is not big, UGF might work better. Also someone will use reverse UGF (water ejecting from the bottom).

The advantage of both method is it increase the water circulation (oxygen and fertilizer) in the substrate which benefits the root development. However if the dirt is too much (too many fish), the rate of consumption of the dirt is less than the rate of decomposition and absorption by plant, than the UGF will be in great trouble (the filtration fuction lost completely and become a poison generation bed).

The conclusion is it can, but it is not easy to keep it running well for long time. Unless you have time to monitor it very closely.

底床沒有對流，會否造成根部缺氧腐爛的情況?

是否同泥的性質有關呢?

Even there is no UGF type of filter, there is still small circulation of water inside the soil, as there are gaps between soil particles. The water movement above the soil and the slight temperature different between different level of soil / water level enable 'micro' circulation. In addition, the movement of small living being - snail inside the soil will also help the circulation of water inside the soil. I think most of the commerically available aquarium soil won't have the problem of
根部缺氧腐爛 in the first year of use.

If the size of soil is or become very fine i.e. clay, aged soil the problem of 根部缺氧腐爛 is likely to occur.

>底床沒有對流，會否造成根部缺氧腐爛的情況?

Yes, that's why you either need heat coil or constantly uproot and replant.

On the other hand, the debate is most over lately. 99% of people, if not all, agree with that if you fertilize with any kind of based fertilizer, which you would have to in highlight, and CO2 tank, you must avoid UGF, or RUGF.

I am also try (planning) to work out UGF for Planted Tank~~~

but really have lots of problem to solve with~~

I tried that before, most easy plants do good, some thrive. But demanding plants don't like that.