Hi all
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I have read the following about feeding fishes:
A fish has a belly about the size of it's eye & it needs to fill it once a day. Generally feeding three times a day will result in optimal growth but some fishes (like mandarins) have a need to feed constantly. Those kinds of fishes will need zooplankton to be in the aquarium or they easily starve fast.
You can feed the "easy" types something like flakes two times a day, from a brand that produce minimum ammonia, I prefer API and I feed fresh shrimp every morning, so the clowns are conditioned to let me feed the anemone without stealing.
I had read that I should allow anemones about a week to settle before feeding it. I fed a LTA one time after introducing it, and then left it to settle. It began eating it's tentacles on day four, apparently it needed food to dig into the substrate. Every other day sound good with anemones, a comparison on lifespan of anemones in aquariums showed that 92% of the anemones that was fed everyday was still alive.
I don't know the different coral needs, so ask around or study
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I personally only have two anemonefishes and a LTA, but if I recall correctly, you would benefit from getting some clean PET bottles, a timer, a bucket, a fluorescent lightbulb and an air pump then you can set up and home-culture bucket & easily grow phytoplankton and small live zooplankton to feed your corals & the fishes will love it.
Brine shrimp is not nutritious (but tastes like candy), moina Salina, Copepods, rotifers & mysis are much better and all easy to grown in bottles stored in a dark bucket.
The anemone fishes are not awesome community fishes, as they perk on safe spots and don't move much if they feel insecure. The two I have by themself, will patrol the entire tank every morning and every evening. When they are finished patrolling in the evening, they socialise systematically in all areas of the tank. They will relax during midday and only be mildly active but many say their clownfish never swim or play. This might be becasue the clownfishes feel crowded with the mixed tank setups.
Anemonefishes are somewhat the cichlids of saltwater, as far as having active and intelligent fishes.
But anemones do not grow entirely on top of normal reefs and many fishes can stress the clowns that are not used to the communities of the reef-dwelling/schooling fishes.
I am sure you will be addicted to saltwater after this 20g
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Enjoy!