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♻️ Transform your tank with nature’s own powerhouse substrate!
Aqua Natural Bio-Substrate Galaxy Sand is a premium, 100% natural aquarium substrate infused with live nitrifying bacteria that instantly cycles your aquarium. Sustainably sourced and triple washed, it supports healthy aquatic plants and creates an optimal environment by converting harmful ammonia into beneficial nitrates. Perfect for all life stages, this substrate is a top-rated choice for professional and hobbyist aquarists seeking a vibrant, eco-friendly tank foundation.

| Customer Reviews | 4.6 out of 5 stars 1,519 Reviews |
C**E
Fresh start tanks
I bought this substrate for a small plant tank and I love it. I wouldn’t recommend to add this to a tank that is set up and already has water in it, because it clouds bad and it did take about 24-36 hours to fully clear up, but it looks BEAUTIFUL. The substrate almost sparkles in the light, and I love the black color of it. I’ve only had plants in it for a few days, so I can’t really speak on how good the substrate truly is, but so far I’m loving it. It does come wet and you do not need to rinse it at all. Once you get past the cloudiness, it looks SO good!! Plus it should be great for plants!
B**Y
Easy to use and looks great in my aquarium.
After reading up on the need for substrate to help plants become established in an aquarium, I searched out substrates. This black one had a good informational video which helped me to know how to add it to my tank. I did have about a day and a half of a blackish film in the water but that did settle down. I also have white stones in the tank and the black and white look great together.
T**D
Great substrate!
I’ve really enjoyed this substrate. I mixed it with my old substrate (which was a mix of sand + small gravel substance) when I upgraded tanks and I like the look of this one a lot. It’s more of a fine sand texture and a really beautiful sparkly black. My plants and ADFs seem to love it. It’s already a bit wet in the bag (they recommend not rinsing it) so it was easy to place into my tank that already had water in it. I love that it has beneficial bacteria to help the tank cycle too. It did make my water a bit cloudy for about ~2 days but this cleared up on its own with time.
B**T
Happy turtle
Looks great, used cup method to add to established tank. Clouded the water for only 2 hours. No spikes or level changes (though I did dose the tank with prime just in case). Looking forward to getting some grasses planted. Map turtle dug around inspecting it near immediately. Ps ignore the ugly state of my moss, it’s a fresh addition and hasn’t greened or grown at all yet.
M**A
Perfect sand
Love it
J**A
Gets cloudy if the filter is on
I got this to hold down the plants in our aquarium. Does a good job so far. Make sure when you put it in you relocate your fish and turn off the filter
J**Y
Bought twice.
This substrate is great! It does a good job helping to start your cycle in a new tank. The sand is relatively easy to clean with a siphon as long as you're careful. Make sure the sand does not go down your drains. The color looks great. I had to deep clean my tank (included trashing all my substrate) because my fish died of disease and I ended up buying this again because I liked it so much. One bag is a good amount for my 5.5 gallon.
A**A
Get this if you want murky cloudy water.
Honestly my tank looks worse than ever before. I had Fluval Stratum down and already added the water, this came too late to add before. So I tried slowly adding it in (Which was impossible, it was too light to slowly add) so now my tank is cloudy and murky and it just sifted and fell through the cracks of the previous substrate. I really hope I don’t have to re-do the entire tank because of this. We will see how it pans out in a few days. I may update this.
S**R
Great size for my little tank
great colouring
F**Y
Amazing substrate!
Awesome! I originally ordered for my 2 black moors tank but unfortunately they passed from an ich treatment being too much for them before I could give them a fresh substrate after the treatment. But I used some in my grandmas beta tanks when I got her actual tanks for them. It has plants and they grow great in the substrate, there will be some fog when you first fill the tank up with water. But it goes away in a hour or so, if your cycling your tanks properly before u out fish in that won’t be a problem to you anyways! Smaller bags, will MAYBE fill a 10 gallon thinly. If you have anything bigger then that get more bags, I ordered 2 and I have a 30, have yet to put it in though so I’m unsure
H**R
It's BLACK!!!!
It's sand so not much I can say about that really. Except that it's BLACK! I suppose I should have thought about that???? as it says 'galaxy'. But it also says 'Natural' so I assumed it would be a regular sand colour. I know it shows a little black on the bag, but again I didn't notice. I guess it's my fault, but it's really not clear
N**K
Calidad
Es un muy buen producto para un ciclado perfecto, y mantener parámetros adecuados. No es sustrato para plantas, no es para filtraciones. Es bacteria en modo sustrato
K**N
Easy cycle, no cloudy mess!
LOVED THIS! It was a welcome change to not have sand floating and clouding up my water for days! Nitrifying bacteria added to get your tank cycled faster, shrimp and plants seems to be enjoying as well! I will use this sand again, and highly recommend to anyone looking for a clean, asthetic substrate.
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