This two-part calcium and alkalinity maintenance system adjusts calcium, magnesium, and strontium ions to Natural Seawater ratios, and achieves a balanced ionic residual. Makes replenishment of calcium and alkalinity easy, and keeps your calcium and alkalinity in perfect harmony, assuring the optimum conditions for growing stony corals and coralline algae. Packaged in two 16 oz bottles or as a concentrate in two 1 gallon bottles.

Iodide and iodine supplement made from potassium iodide and seaweed extracts. Use this supplement to provide an extra boost of this important element and observe the positive effects. Great for growing Xenia, other soft corals and delicate red and brown seaweeds. 250 ml (8.4 fl oz) bottle.

For aquariums with dense growth of reef building corals, this supplement provides an extra boost of strontium that enhances the deposition of calcareous skeletons. Does not contain molybdenum. 250 ml (8.4 fl oz) bottle.

CombiSan - Full Spectrum Supplement developed by Peter Wilkens. CombiSan is a bio-activator that contains essential trace elements in special compounds easily absorbed by marine organisms and fish. No Nitrates or Phosphates. 250 ml (8.4 fl oz) bottle

Two Little Fishies' product line includes trace element supplements, calcium supplements, underwater epoxies, granular iron-based Phosphate adsorption media, and granular activated carbons.Independent studies show that some trace elements accumulate in home aquariums to potentially toxic levels. SeaElements avoids contributing to this problem by including only those elements that are typically depleted from aquarium water — in the proper concentrations and ratios. Other supplements promote a long list of elements in an attempt to offer something "more." We offer the only formula that contains just what your aquarium needs. 250 ml (8oz) bottle.

Calcium Supplement Mix. Our pure source of Calcium Hydroxide makes the ideal solution for replenishing calcium and maintaining alkalinity, for corals, clams, and calcareous algae that build skeletons of calcium carbonate. It also helps maintain pH, precipitates phosphates and enhances protein skimming. Available in 1 lb bottle and 4 lb bucket.