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Half to 3/4 of it has shrunk in the last hour. And the bottom on each tentacle has turned greenish brown. Instead of the normal Please help. Don't want it to die. Clown is still tryin to host. Nitrates at ~6ppm

Went on vacation At some point I assume a snail knocked this guy off his rock He landed brown spot down( it was live tissue ) I found it turned it right side up and the exposed skeleton turned brown. Along with my sandbed And the polyps will not extend Water parameters to follow

They are extremely long. 4-7 inches Tan /white to brown coloration Little "hairs" or legs on eah segment of body. Caught them crawling around some corals. Are they harmless. Or do I flush them?

Small white ...worm like things. Between 4 and 6 mm long usually. They aren't anywhere that gets light. But they're on all my filtration equipment

Anyone have experience with this company's gear????

What's the single best item/ piece of gear. That can take the health/prosperity of my reef to the next level?!?!?

Water temp is 78. I realize problem #1 is I don't know what kind of coral it is.

34 gallons 1 dwarf flame angel 1 emerald crab 5 blue leg hermit 2 nassarius snails 2 turbo snails 1 ricordia mushroom 3 small colonies of polyps And some blue Xenia. What are some compatible fish for the "reef" and te angel ?????

Lighting requirements Food requirements Water conditions etc????? And #2

I swim daily at my job currently. When I do tank maintenance like scraping some bits of algea or removing uneaten food. Could I be contaminating the water with excess chlorine? I always shower before messing with the tank I'm just worried Both of my clown fish have died in the last week...

Guy at LFS offered me a couple of these. Said they were small starfish. They all seem to have six arms/legs/tentacles. If this is a starfish. What kind ? And if you have one a link so I can read more about these guys

What can I expect if I use one of these meds? I've read t can kill beneficial bacteria as well

$80 Worker said petco will no longer carry them. Dot believe it but jst thought I'd pass it on

Noticed a small patch of purple-ish algea on a rock. Is this cyano? And how do I combat it? Normal anti algea procedures? I've reduced my lights by two hours. And added de nitrate into my "sump" area for already have some phosphate removal stuff. May need to change it out...

Any suggestions. A colorful sand softer with some character about him ?!?!?!?

Any foods in particular they go crazy for?!?

I know it's a poor pic I'll try and get a better one later

I found a refractometer on amazon for $20. Says it's useful for all kinds of different water testing needs. Including saltwater aquariums. The one on dr fosters and smith is 40$???? Where should I get mine.

I have two small clowns How will the water flow affect them? It seems like they are fighting the "current" a little bit 34 gal Red Sea max tank with upgrade pump

What does Coraline algea actually do for my system? What benefits does it have for inhabitants fish/invert/corals And what negative effects does it have on the system

34 gal tank Running for 5 weeks 2 days Water temp is 78 degrees F Tested water all ammonia nitrite and nitrate is good Lights 2 55watt t5 50/50 bulbs run 8 hours a day Accidentally go 1 mushroom coral that I'd like to keep alive What's should the ph be? Should I even concern myself with...

I found this bonus after coming home from my LFS with some LR. What is this guy?!?!?!?

This is my first SW tank got it got free from a family member cleaned it up and now it's been running for 4+ weeks 1st I mixed the salt in the empty tank and ran that for one week 2nd week added 15 lbs aragonite for substrate 3rd week added another 20 lb bag of live sand (much finer...

I've read about sensory pits!? Not sure if this is HITH or not

Is this a possible combination or would they attack? I know they're territorial web they breed but. In general they seem pretty calm