I stayed at El Acuario Hotel for 2 weeks in Feb/Mar of this year.
The only "con" of the hotel is that there are no safes in the rooms or at reception. Though I had nothing go missing, it would have been nice to have some where to put my extra spending money right after going to the bank.
Pros: All the rooms have fridges in them and some have kitchenettes. My room had 2 double beds, fridge, TV, and washroom. I really liked having the vanity area outside of the shower/toilet room. I was up on the second floor, furthest away from the reception area. Loved my balcony (with its own hammock) and never had an issue with hot water. While I was there the 2 resident turtles and 1 resident tortoise got a new pool and surround. The rooms, grounds and pool were always kept clean. It seemed like there was always someone doing touchups around the property.
I loved the location of the property. Being 4 blocks off 5th it was always quiet, night or day. 3 or 4 times I walked the 3 blocks to El Fogon for lunch and then another 2 to Walmart for snacks.
I would definitely stay here again.

El Acuario is a perfect spot just a short stroll from the bus stop and the 'Ave'. Surrounded by local taco stalls it gives you a completely different feeling than anywhere else in the area. The staff are very friendly and the pool is a great place to relax.

My two kids and I stayed here the last week of June, room 206. We adore this place and the room was very comfy with a fridge and microwave and little kitchenette. Also, Its hard to find a pool if you aren't staying at a big resort or super pricey place. And we like the location, a few blocks from the beach and 5th ave but with a town feel. I love the it coffee in the lobby at all times. The grounds are lovingly maintained, it's obvious. The maids are great and very sweet.

We have returned this week and now have the suite which is really an apartment that I never want to leave. Price is very reasonable and this place is awesome. 1 and a half baths, full kitchen living/dining room...so comfy. Seriously...never want to leave...but we will have to settle for just coming back again and again :)

We stayed here for 1 night and really glad we did. Got a very nice welcome and free fresh coffee in reception. Had fridge in the room and a/c so everything we needed. It was all clean and the pool was lovely too. It's only a 5 min walk from the main street and beach so nicely out of the way. There is on street parking straight outside hotel which was also handy. Overall great value for money and would recommend staying here.