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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No better substrate fertilizer and Ive used all of them!
This stuff is not to be confused with any other type because its been amazing for my plants. I feel they last me about 4-5 months. Somewhere between this range is when I add more. Results, are amazing. No cloudy water and no muck mess like Thrive tablets. These are 100x better and just wait to see what your plants do holy crap!
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Ive used a lot, and GLA tabs are supirior.
Dont confuse this with anything else on the market. This is a slow release tablet, and it wont cloud your tank. They also last a long time unlike Niloc tablets that disappear almost instantly. This aint no mud crap mixed with water soluble ferts. These are magic slow release balls with magic growth juice inside of them. They contain what roots need and my plants grow like bonkers.
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GLA Root Caps
Very good fertilizer. Even better with CO2. Caps have to be buried deep in the substrate. The gelatin cap dissolves fast and the fertilizer spread on the surface of the substrate. Shrimp safe. My neocaridinas grazed on the fertilizer off the caps and they are still alive.
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substate fertilizer
very interesting method to deliver substrate fertilizer.
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Came free with co2 system
I received these free with my co2 system. I've only had them in my tank for a few days, so I can't give any real feedback on the efficacy. I will give feedback that these should have a desiccant packet or something to reduce moisture. A lot of the ones in the packet I received had seemingly melted together. This could be from heat, moisture, or both. I have other gel capsules so I can still use the fertilizer.
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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.
