Blue Lake Root Tabs 200 Count Aquarium Plant Root Fertilizer Tabs BLtabs Review (2026)

Who this pack fits

The 200 count pack is sized for multi-tank fishrooms, breeders, or anyone maintaining several planted aquariums at once, since that volume of root tabs would otherwise take a single small tank years to work through. Blue Lake also sells the same formula in 50 and 100 count packs, which are a better match for a hobbyist with just one or two tanks who wants to avoid a large reserve of tabs sitting unused. Anyone stocking up to avoid repeat orders, or supplying a club, a fish room, or a shared aquascaping space, is the clearest fit for buying at the 200 count level rather than a smaller pack.

What is in each tab

Blue Lake describes the BLtabs formula as containing eight essential nutrients aimed at feeding root growth in freshwater planted tanks, packaged as slow-release capsules rather than a fast-dissolving powder. The tabs are vacuum sealed in smaller packs of 25 within the larger count, which is meant to keep moisture out and preserve freshness in the tabs that have not yet been opened, an important detail for a bulk order that will not be inserted all in one sitting. Each capsule is designed to release its nutrients gradually into the substrate around a plant's root zone rather than dissolving into the open water column.

How to use and replace them

Root tabs need to be pushed deep into the substrate, ideally with tweezers, near the base of a rooted, heavy root-feeding plant such as a sword or crypt, spaced roughly five to six inches apart depending on planting density; tanks should have at least an inch of substrate depth so the tabs stay buried rather than floating free. Blue Lake rates a single application as feeding for up to a month, with the maker recommending replacement every one to two months as the capsule dissolves and its nutrient reserve is used up by the plant. The tabs are intended for tanks over roughly 10 gallons, where there is enough substrate area to place several without crowding root systems.

Storage and value at this size

Because the 200 count pack is vacuum sealed in batches of 25, opened batches are used up before moisture and air reach the rest of the reserve, which helps the tabs keep longer between insertions than if the whole box were sealed as one unit. Buying at 200 count brings the lowest per-tab price in Blue Lake's lineup, which pays off for anyone running through tabs steadily across multiple tanks, but a single small planted tank dosed only every month or two will still be working through this supply long after it was bought, so freshness of the later batches is worth watching over time.

Verdict and who should buy less

This pack earns its place with hobbyists running several planted tanks or a fish room, where the lower cost per tab and vacuum-sealed batches make a large order practical rather than wasteful. Pick it if root tabs are already a regular part of the fertilizing routine across more than one aquarium. A single-tank keeper with modest planting, or someone trying root tabs for the first time, is better matched to the 50 or 100 count Blue Lake pack, since 200 tabs will otherwise sit in reserve for a long stretch before they are all used.

Frequently asked questions