Description
GLA Terra Root Fertilizer – Aquarium Substrate Capsules - Root Tabs
Slow-release root fertilizer capsules provide essential macronutrients (N, P, K, Mg, Ca) directly to the plant root zone for enhanced growth, development, and nutrient uptake. Nutrients remain localized in the substrate to reduce water column impact, leaching, and nutrient spikes.
Formulated without trace elements or copper, GLA Terra Root Fertilizer supports stable nutrient delivery while preventing trace overdosing. Ideal for use alongside liquid fertilizers for complete nutrient coverage in planted aquariums.
- Provides N, P, K, Mg, Ca for root development and growth
- No iron or trace elements – avoids accumulation and water column interference
- Copper-free – safe for shrimp and invertebrates
- 40 capsules per resealable pouch
Instructions:
Insert 1 capsule every 2–3 inches deep into substrate near plant roots. Use additional capsules for larger plants, heavy root feeders, or nutrient-depleted zones. Replenish every 2–3 months or as needed.
Use with GLA Nectar liquid fertilizers for complete spectrum nutrient support, above and below the substrate.
Customer Reviews
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2 years now on only tablets!
I try them all, Niloc type,Seachem type and Aquario type. These GLA capsule work the best, and you get so many in one pack for a good price. I now go on 2 years maybe slightly more with only these tablets. I use 2 packs in my 90g tank. I refresh every 7-12 months depending on how plants are going. I notice when I do more frequent water changes during the year I need more. But when I stay on EI schedule with 50% water change everything is ok. I like not dosing and this has helped so much.
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These are amazing!
After 2 years of using traditional aquarium fertilizer I skipped year 3 and chose to use 2 packs of these. I started with 80 caps and I still have 20 left. My red plants are more red and general growth was exactly the same when I used liquid fertilizer. What I like about this system is you install once every 6-12 months. I chose 6 just to play it safe and life has been great. I no longer worry about my plants when Im on vacation. I just add more prior to when I leave. I dont think I will be switching back to liquid fertilizer any time soon:)
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GLA SUBSTRATE FERTILIZER CAPSULES - AQUARIUM ROOT TABS
Just put them in my substrate. Have to wait for results but looks good and never been disappointed with GLA before.
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Nutrient rich fertilizer.
I keep a very demanding tank and recently switched jobs that keeps me away. I panicked, had lots of experience with other brads so my panic was elevated. I tried GLA for 4 months with no issue on plant growth. No stunting and no excessive nutrients in the water column. Im on my second pack so Im not sure how long they will last me but so far its been very economical vs liquid dosing. This is working really well.
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Amazing growth from these.
I’ve used a lot of fertilizer tablets over the years and I feel this pack shines the best. My plants just seem richer in color. I’d say growth is on par but the general health and color just seem much better. I use these because I travel and do not dose my tanks much so these have been amazing.
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Shrimp safe fertilizer tablets!
Finally a tablet I can fertilize my tank and not worry about my Taiwan Bee’s! Plants are happy
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Fabulous substrate fertilizer system from GLA
Only my second batch after 6 months. I wanted to see how the first bag went and I was blown away. Im now on my second bag. I used Niloc tabs before but I did not get much response to growth with my plants. With these you see it very quickly and it last quite a while.
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Worth their weight in gold!
My first bag of these were free with a prior purchase last year. I ran out last week and was happy to receive these so quickly. I dont have much time for daily dosing so most all my plants are fed with these now. One thing I noticed right away was the lack of alage in my tank since I started using these. I emailed GLA and they said the capsules did not remove the algae that perhaps the excelled plant growth helped stabilize my tank with the absence of water column dosing. I ordered 10 bags and I feel that will last me for years of dosing. I dont think I will ever dose the column ever again. These are the bees knees.
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Ive tried every substrate fertilizer on the market. None work like these.
Used them all, even DIY versions. Everything from easy-green tablets to niloc tablets and these puppies are like steroids for plants. I use mostly root tabs for my fertilizing because I travel a lot. I have been use to what all the competing tablets achieve upon my return home. Honestly, it makes for a great quality control test environment. Considering I have used all of them. Well, I came home from business and my plants were easily overgrowing one another. Im not sure of its the time release effect, or the nutrients inside. Either way the plants respond like no other.
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Good results from these fertilizer tablets.
So far the plants are doing very well. Growth is steady and no sign of deficiency. I also dose PPS-Pro so Im sure this factors in. All in all the combination of the two is a great bargain.
