Marine Depot offers FREE economy shipping for most products when you spend $29 or more! Your order will be delivered 1-7 business days after it ships out. Economy shipping methods include UPS Ground, USPS First Class, and/or SurePost. You can also upgrade your shipping to UPS Ground which speeds delivery to 1-5 business days. A shipping upgrade is $2.99 for orders under 20 lbs, $3.99 for orders 21-40 lbs, and $4.99 for orders over 41 lbs. Orders placed before 10:30 am PST Monday-Friday are shipped the same day. Free shipping is only available within the contiguous United States. Frozen foods, live foods, and items shipped directly from the manufacturer do not qualify for this special offer.
Free Upgraded Shipping For Orders $250+
Most orders over $250 qualify for FREE upgraded shipping! Your order will be delivered 1-5 business days after it ships out. Thanks to Marine Depot’s two strategically located warehouses in Nevada and Georgia, over 90% of shoppers receive their orders within 2 business using this level of service (UPS Ground). Orders placed before 10:30 am PST Monday-Friday are shipped the same day. Free shipping is only available within the contiguous United States. Frozen foods, live foods, and items shipped directly from the manufacturer do not qualify for this special offer.
$2.99 Flat Rate Shipping For Orders Under $29
Most orders under $29 ship for only $2.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in 1-7 business days after it ships out. Orders placed before 10:30 am PST Monday-Friday are shipped the same day. Our $2.99 flat rate shipping is only available within the contiguous United States. Frozen foods, live foods, and items shipped directly from the manufacturer do not qualify for $2.99 flat rate shipping.
Frozen foods are delivered 1-3 business days from the day your order ships. Frozen foods are shipped every Monday and Tuesday. Shipping cut-off is Tuesday at 10 am PST (1 pm EST). Orders received after 10 am PST on Tuesday will be shipped the following week. Shipping and handling is a $19.99 flat-rate charge so you can order as much or as little as you like.
Orders not shipped within the contiguous United States—the 48 U.S. states on the North American continent south of Canada plus the District of Columbia—are considered international orders. International orders are not eligible for Marine Depot’s free shipping promotions and additional surcharges may apply. It is important to note that not all products we carry can be shipped internationally. Any brokerage fees, tariffs and/or taxes will be billed to you directly by the shipping courier. International customers must use the same billing and shipping address.
Tropic Marin Bio-Actif Sea Salt was developed by German chemist Hans Werner. Bio-Actif sea salts combines high-purity, clean-dissolving Tropic Marin salts with natural marine biopolymers.
Natural reef water contains a variety of organic polymers called micro-gels. The transparent gels are invisible but play a major role in the marine environment. The gels protect and stabilize planktonic colonies that float in the water. These nutrient-rich micron-sized gels are captured and consumed by SPS, LPS and other invertebrates.
The polymers in Bio-Actif help create these packets of nutritious live foods for your corals. Corals will open up and “reach out” to capture the micro-gels floating in the water. Over time you’ll see more vibrant colors and steady growth.
These bio-active substances help reef fish by providing effective protection of delicate mucous membranes. Bio-Actif will also help stabilize a healthy biological balance in newly set-up reef aquariums, allowing you to start reef-building sooner.
Making weekly 15% water changes will maintain a reef environment with a stable pH and alkalinity along with crystal clear water. You’ll see also notice that your protein skimmer will work more efficiently due to the bio-active substances contained in the salts.
What we really like about Bio-Actif Sea Salt Mix:
Clean dissolving salt crystals
Stable pH and alkalinity
Corals respond to natural food sources in the aquarium
Micro-gels help keep the water clear
Improves protein skimming
Helps maintain the natural biological balance
Bio-Actif Sea Salt Mix Features:
Rapid coral growth, even in new reef tanks.
Better Skimming action for the elimination of contaminants and suspended matter provides a permanent solution to cloudiness, allowing the reef aquarium to shine in full clarity in the most vibrant colors.
Enhanced biological activity stabilizes water chemistry and keeps the water crystal clear.
Can be used in new and established reef aquariums.
Quick-dissolving formula leaves no residue
Comes in a reusable plastic bucket
Manufacturer Info
Tropic Marin Tropic Marin: A strong foundation in science and hobby: The successful methods and techniques of today`s marine aquarists are the result of a close collaboration between serious hobbyists, scientists and specialists at public aquariums. Tropic Marin came about in exactly the same way over 30 years ago! This close cooperation resulted in one of the first complete one-part synthetic marine salt mixtures that provided the optimum natural environment for the professional as well as the private aquarist.
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Does this salt mix require a 24 hour wait period upon .mixing?
Some of the different salt mixes require to be mixed and then to sit for s long period of time before use in aquarium
This is a top notch salt. It works great for my system. It dissolves with ease and does not leave any residue. The parameters are pretty much on point and as advertised. I am happy with it. The price, not so much but you get what you pay for. On a quick note, I ordered two buckets and one arri...Read More
This is a top notch salt. It works great for my system. It dissolves with ease and does not leave any residue. The parameters are pretty much on point and as advertised. I am happy with it. The price, not so much but you get what you pay for. On a quick note, I ordered two buckets and one arrived completely damaged in a case. I called MD and they honored it immediately. I sent them the info they requested and within a few days I had a new bucket. Thank you MD, you guys are awesome!Hide
I used Bio Actif Sea Salt since my being in the hobby but had issues with the brown slime that would build up in my mixing tank. It was everywhere and I couldn't get rid of it. Scrubbing the mixing tank with vinegar didn't work. Out of desperation I tried another top quality, more expensive salt mix...Read More
I used Bio Actif Sea Salt since my being in the hobby but had issues with the brown slime that would build up in my mixing tank. It was everywhere and I couldn't get rid of it. Scrubbing the mixing tank with vinegar didn't work. Out of desperation I tried another top quality, more expensive salt mix (yes there are more expensive mixes.) The corals in my mixed reef tank let me know that was a mistake. They didn't extend as much and some started turning white. Again out of desperation I switched back. Even though I made the change gradual both ways I lost some SPS. My tank and inhabitants tell me they prefer Bio Actif Salt mix therefore I will deal with the brown slime and I also noticed after using a different salt mix Bio Actif doesn't mix as quickly as others. I do a 10% water change weekly and do not dose Bio Actif keeps my levels where they need to be for my 75 gallon mixed reef tank I could do without the slime and would appreciate better mixing therefore the 4 star rating.Hide
I've used tropic marin and many others salts over the years,but return to this salt works great for me running all my tanks ULNS/zeovit. I highly rcommend this salt to anyone.
Most orders under $29 ship for only $2.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in 1-7 business days after it ships out.
free shipping for orders $29+
We ship 99% of the products we carry for free within the contiguous United States using a mix of economy methods including USPS First Class Mail, SurePost and UPS Ground. Your order will arrive in 1-7 business days. Just spend $29 or more!
free faster shipping for orders $250+
Over 90% of shoppers receive their orders within 2 business using UPS Ground. Upgrade from free economy shipping to UPS Ground for only $2.99—or spend $250 and we’ll upgrade you automatically!
need your order even faster? no problem!
Expedited shipping services are available for most products if you are in a hurry. Get guaranteed delivery in 2 business days, 1 business day, or next day by 10:30 am. Costs vary by location.
buy it today and we'll ship it today
Same-day shipping is available Monday-Friday for most products—place your order by 10:30 am PST. Pre-ordered and back-ordered items do not qualify, nor do drop-shipped, live, or frozen shipments.
live plants, live foods, and frozen foods delivered to your door
We ship live plants, live foods, and frozen foods within the contiguous United States. Each of these categories is subject to its own $19.99 flat-rate shipping fee to cover the special packaging and/or expedited shipping costs required to ensure safe delivery. Orders with 12+ live plants ship free!
Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.
A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.
We are unable to accept returns of Digital Aquatics, Neptune Systems, Vertex Aquaristik, Aqua Illumination (AI), EcoTech Marine, GHL, or Seneye products once the manufacturer's packaging seals have been broken.
Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.
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