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Old 03-06-2010, 03:04 PM   #11
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OK.. I am not the end all with crab knowledge and I concede that all crabs are not bad BUT.........
Kept any snails with hermitcrabs?? I p/u 90 lbs of live rock last week from a reef tank being broke down. The reefer commented how snails would not live in his tank. Hmmmm.....when the rock was inspected b4 going into my qt I found 1 (one) little hermitcrab. Called the seller and he was unaware of that little critter. This is something I agree with:

By consensus experienced hobbyists, and knowledgeable sources agree on the following:

1. Hermit crabs are omnivores. They will eat whatever they can get their claws on. They will eat fish, snails, corals, other invertebrates as well as their 'clean up' duties of eating left over food, micro algae and even diatoms. Many reef fishes 'sleep' by lodging themselves into a crevice or hole in the live rock. Hermit have been known to attack and injure sleeping fishes. Some fish deaths have been attributed to a hermit crab attack.

2. They are aggressive. As they age they get pretty belligerent. If left underfed you can expect them to begin moving any rock they can, to get at food, as well as eating any other Marine life. As they age, they become quite aggressive. If they think a snail has a good looking shell, they'll kill it just for the shell.

3. They don't always eat what you want them to. Hermit crabs are also opportunists. That is, they will eat whatever is available and starting with what they want to eat. By the time they starve enough to get rid of some nuisance algae, they are in the mood to attack/consume other marine lifeforms -- the ones you bought to raise.

4. They are a high-profit margin item. A retailer may buy them for nickels a piece and sell them for dollars each. Because of this, the greed to get them into the hobbyist's aquarium is strong. Those who sell them want to make their money and will encourage everyone to put them into the tanks. Some are sold as 'herbivores' that will rid the tank of certain micro algae. Not.

If you check out some of the writings I referenced in the earlier post, they will address the downside to having these crabs. Hermits are interesting, but not suitable for a marine aquarium, whether fish only or reef. They are genuinely not worth the risks they pose. Their 'clean up function' are easily handled by snails and less aggressive marine life that can be chosen to get along in a reef or community fish tank.

I think their greatest value is as a natural food source for some triggers, puffers, lionfishes, wrasses, etc.
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Old 03-06-2010, 03:17 PM   #12
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That`s pretty good info even though my experience doesnt allow me to agree with it all. They are excellent scavangers and good janitors. I dont doubt from you or anyone else that they have not ever took down a fish and I know they have taken down a snail or two but mine and others experiences are that not all crabs are bad and can be kept in a SW reef tank. You are the one that made the statement "CRABS and fish don"t mix in an aquarium." Then you said "Just the facts, noting but the facts." Your statement about crabs and fish dont mix is not 100% true. I have 12 years of experience to prove that. If not 100 percent true then that cant be the facts. I just dont want other SW aquarist to think you cant have crabs in a SW tank. That`s the only reason I`m saying that. Not calling anyone a liar or wrong. Just my experience
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Old 03-06-2010, 04:20 PM   #13
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Quote:
Originally Posted by cagey View Post
OK.. I am not the end all with crab knowledge and I concede that all crabs are not bad BUT.........
Kept any snails with hermitcrabs?? I p/u 90 lbs of live rock last week from a reef tank being broke down. The reefer commented how snails would not live in his tank. Hmmmm.....when the rock was inspected b4 going into my qt I found 1 (one) little hermitcrab. Called the seller and he was unaware of that little critter. This is something I agree with:
your story is missing a lot of information, sorry. But to say that he couldnt keep snails because he had one hermit crab that was killing them all is purely a guess. unless it was one of the large "no no" species for a reef (I highly doubt one scarlet hermit is capable of that) what else was in the tank? what kind of snails were they? how much food was there for them in the tank? what was the temp like in the tank? water param.? how was he aclimating them?

Do you see what I am getting at? there are multiple explanations to why he couldnt keep snails. And just for the record I keep snails and scarlet hermits and one electric blue hermit and I still have quite a few snails, granted every now and then one gets eaten because they fall upside down and cant turn back over without me helping them or a hermit wants a new shell.
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Old 03-06-2010, 06:38 PM   #14
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heres the 2 happy new clown fish i picked up today, 5 hours later and looking happy. ones a fancy clown fish and the other is a black and white one.
the set up is small, just a 20 gallon tank. ill take the advice on the snails but wont pick them up until i get paid again. i already dropped a nice fee on this tank and set up and supplies. awesome hobby with a lot of care and interaction. by far much more beautiful fish then a regular fresh water tank.
thanks for the people who responded about my issues and didnt get side tracked and argued. i have a question about cleaning the tank and water swapping how often and when should i do it for a 20 gallon. and how much water at a time?
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Old 03-06-2010, 07:21 PM   #15
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sorry didnt mean to get side tracked. glad you got everything fixed. I love the clowns, those are 2 of my favorite species. most people do a 10-20% water change every 1-2 weeks. with a tank that small it shouldnt be to bad. 2-4 gallons isnt much.
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Old 03-06-2010, 07:53 PM   #16
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I personally think we all got sidetracked. We started talking about windex in a tank at first. Then we went to Clean up crews then to clown fish. I`m sorry if I was considered arguing. I really wasnt but so be it. Your clowns look very nice and I hope they do great.
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Old 03-06-2010, 08:02 PM   #17
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Nice clowns. If your lucky they might lay eggs.
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Old 03-06-2010, 08:11 PM   #18
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Looks like the Windex problem was solved with a water change. Glad to hear it. Nice clowns too!
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Old 03-06-2010, 08:51 PM   #19
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I will just assume since you started the tank yesterday, that you did not cycle it?

and on the issue of hermits. I got a large one with white legs that started going after the snails. I couldn't tell if he was eating the snail or just stealing food from its mouth. either way, it's in the sump now.
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Old 03-06-2010, 10:00 PM   #20
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well im only doing what the guy at the lfs told me to do, and hes pretty geniune and i dont think he wants his fish to die. i took a sample of the water in today and he tested in front of me and my wife and show us on the chart it was perfect in all 3 test. he said it was ready to have the clowns. did i do something wrong?
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