40 gallon reef

RO/Di water is water that was purified first by Reverse Osmosis (hence the RO), and then run through a DeIonizer (the DI). This is one of the more pure forms of water, without contaminants.

so if I got water from a petstore would that be ok?

would this be a good cleaner crew?

1-2 fire shrimps
1-1 coral banded shrimp
4-5 turbo snails
4-5 nassaruis snails

other inverts
1-1 scarlet skunk cleaner shrimp
1-1 pistol shrimp

Is this a good invert list?

I think you have to many snails. I would expect them to slowly starve to death. I would cut the numbers in half.

Also, be cautious with the Coral Banded Shrimp mixing with other shrimp. They can be aggressive. Some hobbyists have even reported CBS attacking fish. I have personally witnessed very aggressive pursuing of small fish, but the CBS is never quick enough to catch them.

so drop the snails number to 3 or 2 of each and drop the coral banded shrimp and I should be ok with the inverts being peiceful to each other and the fish? If i decided not to get clownfish what could I add? I will be making a build thread later.

Can I use an under ground filter?

I hope this question is not serious. If it is, then you have not even started researching a complicated project.

Here is a good place to start:
http://www.tropicalfishkeeping.com/m...shwater-31955/

You are joking, right?

I misread something, sorry bad question.

Reading again this morning, sorry if my response was harsh. Hang out here for a while and you will see that some people post these types of questions just to be rude. I would never expect that from you, which is what got my blood boiling a bit. Again, my apologies.

Now, back to the question. I have seen some applications of undergravel filters modified for other purposes. Purposes which I personally disagree with, but at least that make the question a little more reasonable. Were you reading on plenum systems? Or was this just one of those brain dead moments? Hey, it happens. For about 10 seconds last Saturday I thought that Louisville might upset Kentucky in Rupp Arena. Yeah. Duh, brain dead.

It was a dead brain moment. Your response was fine. Back to stocking.

1-2 fire shrimp
2-3 turbo snails
2-3 nassaruis snails

other inverts
1-1 scarlet skunk cleaner shrimp
1-1 pistol shrimp

so these inverts should be fine with these fish?

3 banggai cardinals
2 oellaris clowns
1 YWG
1 royal gramma

are all of these are reef safe?