EXHIBIT 23 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statement Numbers 33-4190, 33-41201, 333-00421 and 333-16637 of Isco, Inc. and subsidiaries on Form S-8 of our report dated October 1, 1999 appearing in the Annual Report on Form 10-K of Isco, Inc. and subsidiaries for the year ended July 30, 1999. Deloitte & Touche LLP Lincoln, Nebraska October 21, 1999 40