About
Aquatica Corals and Custom Aquariums is a saltwater-only aquarium store in San Marcos, CA, and stepping inside feels less like a pet shop than a slice of the reef itself — tanks glowing with vibrant corals, seahorses, gobies, peppermint shrimp, and marine fish that regulars swear rival the displays at Scripps Aquarium. Owner Steve has built the shop into a destination for reef keepers across San Diego's North County, and the team around him — Ethan, Bree, and Dan among them — keeps that reputation going. The coral nursery is the heart of the store.
Hobbyists come specifically for the variety and quality, and recent visitors have walked out with bright zoas and a torch coral, mentioning that prices have come down and now run competitive with other San Diego shops. A visiting coral biologist praised the staff's knowledge and husbandry as excellent, and one customer credited Ethan with saving their tank while Bree helped them sort out the rest. If you're after a yellow tang, clownfish, or a hard-to-find coral for sale in San Marcos, CA, this is the kind of place that will track it down rather than upsell you something that won't suit your system.
Beyond livestock, Aquatica is known for custom aquarium builds and large-tank relocations — moving 400-gallon glass systems up multiple flights of stairs, setting up Red Sea Reefer and Waterbox tanks, and helping hobbyists graduate from small Innovative Marine starters to full reef displays. They carry Red Sea salt and equipment and stock supplies and fish food alongside the livestock, so you can grab Mysis or a maintenance part on the same trip. What keeps customers loyal is the ongoing reef maintenance service: after a build, the team returns for regular cleanings and feedings, so a stunning saltwater display can live in a home or office without the owner ever mixing salt or hauling buckets.
Steve is famously direct — if a fish won't work in your tank, he'll say so and point you toward a better pick. Longtime reefers drift in just to talk shop, which is exactly why this San Marcos aquarium store feels like a community as much as a place to buy coral.
What they offer
Fish & livestock for sale at Aquatica Corals and Custom Aquariums in San Marcos, CA
Aquatica Corals and Custom Aquariums stocks corals, reef fish, invertebrates, clownfish, live rock, tangs, shrimp, rare and hard-to-find species and saltwater fish for sale in San Marcos, CA. As an aquarium store serving San Marcos, CA, it also carries fish food and offers tank maintenance, aquarium setup, tank cleaning, custom tank builds, aquarium consultations and fish boarding.
- Livestock & products
- Services
- Specializes in
Highlights
What makes them special
- Saltwater-only coral nursery with rare species, plus recent zoas and torch corals at newly competitive prices
- Custom aquarium builds and large-tank relocations, including Red Sea Reefer and Waterbox systems
- Ongoing reef maintenance service with regular tank cleanings and feedings for home and office displays
- Knowledgeable, honest team — Steve, Ethan, Bree, and Dan — praised even by a visiting coral biologist
- Sources hard-to-find marine livestock like yellow tang and Black Storm clownfish, plus fish boarding for traveling customers
From keepers
Customer reviews
“Awesome store! Super friendly and helpful. Ethan saved our tank and Bree helped us a ton too. Great coral selection!!”
— Emily Sumner5.021 hours ago“Steve is awesome!! Always keeps it real 💯”
— ALBERT DE ALBA5.02 weeks ago“Great coral, and super nice staff.”
— Nicholas Levitt5.02 weeks ago“Stopped into the shop yesterday on the way home and was really happy with what I saw. Been awhile since I've been here but tons of corals seems like prices have gone down and are very competitive to my other lfs in San Diego. Picked up some really nice zoa and a torch. I would highly recommend this place especially if you're in North county San Diego”
— John Casper5.03 weeks ago“I was at job site near by so I stopped by for some Mysis on the way home, I paid not looking at the price because Mysis is usually pretty cheap. I got to my truck and realized I almost paid $15 for a 3.5g Hikari Mysis cube pack, so I went and asked for a refund since my LFS sells them for $6. Walked in and asked for a refund I let the owner know it’s because of the high price, owner rolled his eyes and got out of his chair to do the refund then proceeded to say “that’s how not it works” I was so confused what do you mean that’s not how it works? I just want a refund Lol. A while ago I went in to this fish store and asked to try on a camera lens for my phone and I accidentally dropped it and it broke I apologized and owner didn’t seem bothered or say anything I completely forgot about this and he somehow remembered lol. He tried using this against me during the refund that I never paid for the lens I broke, if he really was bothered he should said something at that moment but to bring it up such a long time after that is ridiculous. The owner is a complete joke accidents happen in a business buddy….. I told him they are much cheaper at AW he said next time go to AW, Definitely won’t be back I got my refund and walked out told him to have a good day.Owner is a clown his coral is so overpriced selling a $30 black light torch for $75. Take your business elsewhere this guy hold grudges over an accident that happened a long time ago lol. I wish I could rate zero stars specifically for the owner behavior.”
— melvin juarez1.03 weeks ago“Great quality and healthy fish and coral. Excellent prices and really helpful”
— Craig Bristow5.0a month ago“I bought a Yellow Tang from them and the fish arrived in healthy condition. Dan is a great guy — very responsive, easy to communicate with, and willing to work out a fair deal. Overall, it was a smooth experience and I’ll definitely do business with him again!”
— Le Uy5.0a month ago“They answered all my questions and offered suggestions to what would make me a successful reefer. Knowing it was a small sale for them, they just want you to succeed. Amazing customer service. Will be returning when my tank has matured.”
— Mark Crowley5.0a month ago“This is a fantastic saltwater lfs. As a coral biologist I have a very high standard. Steve and Ethan far exceed this with their excellent knowledge and husbandry skills. Thankful this store exists, keep up the great work guys”
— Coulson Lantz5.02 months ago“Man this place is the spot! All your salt water needs in one place! Steve has been nothing but helpful since the day I walked in. I had so many questions about my freshwater tank and he pointed me in every correct direction. Family environment and he puts his knowledge and his heart into every tank and every client to make sure we’re all satisfied. I will not be going anywhere else.”
— Matthew Duffield5.03 months ago
Reference
Frequently asked questions
Note — Store information and services may change. Always call (760) 597-0445 to confirm current availability, hours, and services before visiting Aquatica Corals and Custom Aquariums.